please show the calculation step by step . Thanks

(b) You bought GameStart shares on Jan 1st of this year at $30.50. The share paid an annual dividend of $1.90 during the year. However, the share price underperformed during the year and you sold them at $18.70 on Dec31. What is the \% return you realized on GameStart shares? (6 marks) (c) Critically discuss how an investor can generate returns via short selling and TWO (2) risks involved in executing a short sale. (9 marks)