For Programming Assignment $4,$ you are required to write the following two Python functions that return a value. $[$MO $4\mathrm{.}4]$

a$.$ A function that returns the circumference of a circle with the given radius. The circumference is given as $2^{**}$ pi$*$radius$.$ Sample runs would be as follows.

print$(circumference(4))$

$25\mathrm{.}132741228718345$

print$(circumference(7))$

$43\mathrm{.}982297150257104$

b$.$ A function that returns True if one of its inputs is the square of the other one, and False otherwise. Sample runs would be as follows.