Part A: Leap Year

A leap year in the Gregorian calendar system is a year that is divisible by 400 or a year that is divisible

by 4 but not by 100. Write a function named leap_year that takes one string parameter. It returns

True if the string represents a leap year, and returns False otherwise.

For example, 1896, 1904, and 2000 are leap years, but 1900 is not. Therefore,

leap_year(1896)

returns True.

(Optional challenge: write the function suite as one line.)

Part B: Rotate

Write a function rotate(s,n) that has one string parameter s followed by a positive integer

parameter n. It returns a rotated string such that the last n characters have been moved to the beginning.

If the string is empty or a single character, the function should simply return the string unchanged.

Assume that n is less than or equal to the length of s and that n is a positive intger.

For example:

rotate('abcdefgh',3) returns 'fghabcde'

(Optional challenge: write the function to handle n larger than the length of s.)

Part C: Digit Count

Write a function named digit_count that takes one parameter that is a number (int or float) and

returns a count of even digits, a count of odd digits, and a count of zeros that are to the left of the

decimal point. Return the three counts in that order: even_count, odd_count, zero_count.

Be careful of the edge case where the number starts with a decimal pointconversion of such a

number to a string places a zero before the decimal point. See correct behavior in the final test case

below.

For example:

digit_count(1234567890123) returns (5, 7, 1)

digit_count(123400.345) returns (2, 2, 2)

print(digit_count(123.)) returns (1, 2, 0)

print(digit_count(.123)) returns (0, 0, 0)

Part D: Float Check

String has a method s.isdigit() that returns True if string s contains only digits and False

otherwise, i.e. s is a string that represents an integer. Write a function named float_check that takes

one parameter that is a string and returns True if the string represents a float and False otherwise.

For the purpose of this function we define a float to be a string of digits that has at most one decimal

point. Note that under this definition an integer argument will return True. Remember edge cases

such as 45. or .45; both should return True.

For example:

float_check('1234') returns True

float_check('123.45') returns True

float_check('123.45.67') returns False

float_check('34e46') returns False

float_check('.45') returns True

float_check('45.') returns True

float_check('45..') returns False

(Optional challenge: write this function suite in one line.)