3. Marinda wants to invest N$1250 in a savings account. In account A, the total amount of money increases by 4% each year. In account B, the total amount of money increases by N$70 each year. In both cases the increase is added to the account at the end of each year. (a) For account A, calculate the total amount of money at the end of 5 years. (b) For account A, calculate the number of years it would take for the total amount of money to exceed N$2000.​