I don't understand these three questions, Could u help me to deal with them, thx

Based on the dividend growth model, what price should an investor pay for a share with average annual growth 3 per cent in the future in which the initial dividend is 50p, and the rate of return for the risk class is 10 per cent per year? a. 778p. b. 736p. c. 750p d. 700p For a particular share, a dividend of 40p will be paid after 2 year, at which time the share ld for 200p. If the risk class justifies a rate of return of 10 per cent per year, how much should an investor pay for the shares today? a. 200 b, 198p- c. 250p d. 160p- A business has an initial value of 12m. In the following four years its value is assessed as 13.5m, 17m, 18m, and 19m for years 1 to 4, respectively. The discount rate is 10 per cent per year. At the end of which year should the business be sold? a. Year 1 b. Year 2- C. Year 3 d. Year 4