$ 90.08 Working:Step-1:Monthly Payment CalculationMonhly Payment=Loan Amount/Cumulative discount factor=$ 21,618/ 137.199=$ 157.57Working:Cumulative discount factor=(1-(1+i)^- n)/iWhere,=(1-(1+0.00417)^-204)/0.00417i=5%/12= 0.00417= 137.199n=17*12=204Step-2:Repayment schedule of first monthMonthBeginning Loan balanceInterest for the monthMonthly PaymentPrincipal RepaymentEnding Loan Balanceab=a*5%*1/12cd=c-ba-d1$ 21,618.00$ 90.08$ 157.57$ 67.49$ 21,550.51 Solution $ 90.08 Working:Step-1:Monthly Payment CalculationMonhly Payment=Loan Amount/Cumulative discount factor=$ 21,618/ 137.199=$ 157.57Working:Cumulative discount factor=(1-(1+i)^- n)/iWhere,=(1-(1+0.00417)^-204)/0.00417i=5%/12= 0.00417= 137.199n=17*12=204Step-2:Repayment schedule of first monthMonthBeginning Loan balanceInterest for the monthMonthly PaymentPrincipal RepaymentEnding Loan Balanceab=a*5%*1/12cd=c-ba-d1$ 21,618.00$ 90.08$ 157.57$ 67.49$ 21,550.51.