1. At a certain time, each year, the scaling down of weekly production of sun hats starts. (a) If weekly production is 190000 hats, and is reduced by 15200 hats each week, use series to calculate (i) The weekly output after 10 weeks of scaling down, (ii) The total production during that 10 week. (b) Calculate the weekly reduction if the production should be scaled down from 190,000 to zero in 12 weeks. 2. GH200,000 is invested for four years at 12% per annum compounded monthly. (a) Calculate the total value of the investment. (b) Compare the return on the investment when interest is compounded annually to that when compounded monthly. 3. A car which was bought for GH82,000 when new was valued at GH69,700 at the end of the first year. It then depreciated each year by 1021% of its value at the beginning of that year. Calculate (a) the rate of depreciation at the end of the first year. (b) the value of the car at the end of the fourth year. 4. A company operates a savings scheme (interest rate 4% per annum) for its employees. (a) Calculate the amount saved at the end of one year when \( \mathrm{GH} \Varangle 200 \) is deposited at the end of each month, (b) How much should be saved from a monthly salary in order to have GH 5000 at the end of the year