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Write a function, mean that takes two numbers and returns their mean.

Example:
>>> mean(3, 5)
4.0

Write a function, square that takes a number and returns its square.

Example:
>>> square(3)
9

Write a function, square_of_mean, that takes two numbers and returns square of their mean.

Example:
>>> square_of_mean(4, 6)
25.0

Restriction: You cannot use *. + or / inside this function's body

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Write a function that takes two numbers, x and y, where y is a single digit number, and returns True if x ends y, or False otherwise. Example:
>>> ends_with(16, 6)
True
>>> ends_with(34, 3)
False

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Write a function is_low_battery, that takes an integer, level, and returns True if it is below 20, and False otherwise.

Write a function battery_status, that takes an integer, level and:
- It returns "critical" if level is below 5
- It returns "low" if level is between 5 and 19 (including both)
- It returns "normal" if level is 20 or above

Restriction: You CANNOT use any relational operator inside this function's body (<, >, !=, ...).

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Write a function that takes one number, and returns True if it ends with 4, or False otherwise. Example:
>>> ends_with(14)
True
>>> ends_with(13)
False

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Define a function, are_equal, which takes two values, and returns True if they are equal, False otherwise.

Define a function, get_count, which takes one word and one character, s and char, and returns how many times char appears in s, till it becomes char. Example:

>>> get_count('abaa', 'a')
3
>>> get_count('abaa', 'b')
1
>>>

Restrictions:
- You cannot use == or !=
- You cannot use method count of strings

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Define a function max_of_two, that takes two numbers, a and b, and returns the larger of the two numbers.

Restriction: You cannot use max or min functions.

Define a function, max_of_four, that takes four numbers, w, x, y and z, and returns the largest of the four numbers.

Restriction: You cannot use max, min or any relational operator (<, >=, ...).

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def is_vowel(char):
    for vowel in 'aeiou':
        if char == vowel:
            return 1
    return 0

def count_vowels(s):
    count = 0
    for char in s:
        count = count + is_vowel(char)
        if char == 'y':
            print('reset')
            count = 0

    return count

res = count_vowels('traukni')
print(res)

Given the above script:

What is the value of res:
What is the printed value:

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def a(x):
    return x % 3 == 0

def b(w, y):
    if w == y:
        return True
    return False

def ani(x, y):
    if not b(x, y):
        return a(x)
    elif b(x, y) and not a(x):
        return 'jo more'
    return b(x, y)

ani(3, 3)
ani(5, 5)

Given the above script, what are the results of the following calls:

ani(3, 3):
ani(5, 5):

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Complete execution flow of the following program

Misses: 0

def divide(a, b):
    while a > b:
        a = a / 2
    return a

def sub(b):
    i = 0
    while i < 10:
        i = i + b
    return i

res = sub(10) + divide(6, 2)

Complete execution flow of the following program

Misses: 0

def calculate(x, y):
    res = x * y
    res = x + res
    revert(res, x, y)

def revert(a, b, c):
    res = a - b
    res = res / c
    print(res)

calculate(2, 3)

2.0
>>>