PART B: 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 a

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

For example, $1896,1904,$ and $2000$ are leap years, but $1900$ is not. Therefore, leap$\_$year $(\text{'}1896\text{'})$

returns True.

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

You will work with a partner on this exercise during your lab session. Demonstrate your

completed program to your TA$.$ On$-$line stadents should submit the completed program $($named

$"$

lab$04.$py$")$ for grading via the Codio system.

PART C: ROTATE