c$)$ A fresh graduate bought a used car for RM$22,500$ with a $15\%$ down payment. He took a loan to settle the balance at a bank that charged him an interest rate of $5\%$ compounded monthly. He was required to pay equal amount payments for $7$ years to settle the loan.

i$)$ Calculate the monthly payment and the total interest charged. $(6$ marks$)$

ii$)$ If the fresh graduate failed to pay the first three monthly payments, calculate the amount he had to pay on the fourth payment in order to settle the outstanding arrears.