Your assignment is to write a function, extraPayments, that computes total number of monthly payments required to pay off the loan given the barrower makes one extra

payment per year $($i$.$e$.$ once every $12$ months$).$

The function accepts the following four scalar inputs $($in order$)$:

The loan principal, amount of money barrowed $(P)$

The annual interest rate $(r)$

The loan term in years, number of years to payback the loan $(N)$

The extra annual payment amount $(E)$

Your function should output the following two scalar values $($in order$)$:

The total interest paid over the duration of the loan $(T).$

The number of months saved from the original term due to the extra annual payment $(S).$