An amount of $$19,000$ is borrowed form the bank at an annual interest rate $14\%$

a$.$ Calculate the equal end$-$of$-$year payments required to completely pay off the loan in $4$ years

b$.$Calculate the repayment amount if the loan $($$$19,000)$ will be repaid in two equal installments of $$9,500$ each, paid at the end of second and fourth years respectively. Interest will be paid each year