Calculate the amount and compound interest on (a) `Rs 10,800` for 3 years at `(12) 1/2%` per annum compounded annually. (i) `Rs 18,000` for `(2)1/2` years at `10%` per annum compounded annually. (q) `Rs 62,500` for `(1)1/2` years at `8%` per annum compounded half yearly. (y) `Rs 8,000` for 1 year at `9%` per annum compounded half yearly. (You could use the year by year calculation using SI formula to verify). (z) `Rs 10,000` for 1 year at `8%` per annum compounded half yearly.