At what rate per cent will a sum of ₹ 4000 yield ₹ 1324 as compound interest in 3 years ?

A person invests ₹ 5000 for three years at a certain rate of interest compounded annually. At the end of two years this sum amounts to ₹ 6272. Calculate :

(i) the rate of interest per annum.

(ii) the amount at the end of the third year.

Find the time, in years, in which ₹ 4000 will produce ₹ 630.50 as compound interest at 5 percent p.a. interest being compounded annually.

Divide ₹ 28730 between A and B so that when their shares are lent out at 10 per cent compound interest compounded per year, the amount that A receives in 3 years is same as what B receives in 5 years.