I just need 7c. I attached a photo of the answer. Please shows steps to get the answer.

(7) Let m be a positive real number. Suppose interest is paid once every m years at a nominal interest rate i( )This means that the borrower pays interest at an effective rateof miper m year period. (a) Find an expression for /(m (b) If i( )-06, find i. ) in terms of i. (c) Define dm to be the nominal discount rate payable once every m years. This means that the borrower pays discount at an effective rate of -mdper m year period. Find a formula that gives d h) in terms of i(m), and a formula that gives d ) in terms of d