Need four parts please and one line answer no full explanation required.Thank you.

a)I nedd to find the interest paid on a loan of $1,200 for three years at a simple interest rate of 5% per year.

b)Determine the maturity value of a loan of $1,750 for 28 months at 9.8% simple interest per year.

c)Determine the simple interest rate of a loan of $5,000 that is made for three years and requires $1,762.50 in interest.

d)A loan of $16,840 is borrowed at simple interest of 9% and is repaid with $4,167.90 interest. Determine the loan duration?