A bank that provides overdraft protection charges $9$ percent for each $$100($or portion of $$100)$ borrowed when an overdraft occurs.

a$.$ What amount of interest would the customer pay for a $$220$ overdraft? $($Assume the interest is for the full amount borrowed for a whole year.$)$

Interest amount

b$.$ How much would be saved by using the overdraft protection loan if a customer has three overdraft charges of $$25$ each during the year?

Savings