Complete execution flow of the following program

Write the above formula (pythagorean theorem) in python, representing it as a function.
Write a function pythagorean_theorem, which takes two numbers, a and b, and returns c.

Write a function, hypotenuse_times_3, that takes a and b as arguments, it finds c using pythagorean_theorem, and returns the result of c * 3

Write a function that takes two positive integers, n and m, and returns sum of all numbers between 1 and n that are fully divisible by m. Example:

>>> sum_of_divisibles(6, 3)
9
>>> sum_of_divisibles(10, 4)
12

Define a function, is_greater, that takes two numbers, a and b, and returns True if a is greater than b, otherwise False.

Define another function, count_greater_than, that takes three numbers, n, a, b and c, and returns the count of how many of the three numbers a, b, and c are greater than n.

Example:
>>> count_greater_than(1, 2, 2, 3)
3
>>> count_greater_than(2, 2, 2, 3)
1
>>> count_greater_than(6, 5, 2, 3)
0

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

Define a function, add, which takes two numbers, a and b, and returns their sum.

Define a function, add_up_to, which takes one positive integer, n, and returns sum of all numbers between 0 and n (inclusive). Example:

>>> add_up_to(4)
10 >>>

Restrictions:
  - You cannot use range
  - You cannot use +
  - You cannot use sum

Write a function abs, that takes one integer and returns its absolute value.

Write a function add, that takes two integers, a and b, and returns their sum.

Write a function divisible, that takes two integers, x and y, and returns True if x is fully divisible by y, and False otherwise.

Write a function calculate, that takes one integer, n, and:
  - It returns 7 if n is fully divisible by 7.
  - It returns its absolute value if n is fully divisible by 3 and 4.
  - It returns its double if n is not fully divisible by 3 and 4.
  - It returns its None otherwise.

Examples:
>>> calculate(14)
7
>>> calculate(-12)
12
>>> calculate(13)
26
>>> calculate(8)
>>>

Restriction: You CANNOT use any arithmetic operator (+, -, ...), modulus (%), or any relational operator (<, >, !=, ...) inside this function's body.

A taxi charges:
  - $4 for the first km
  - $2 for each km from 2 to 10
  - $1.50 for each km beyond 10

Write a function that takes the number of kilometers traveled and returns the total fare. Example:
>>> taxi_meter(1)
4
>>> taxi_meter(2)
6
>>> taxi_meter(10)
22
>>> taxi_meter(15)
29.5

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