b) Suppose Asem Kitiwa pays GHe 7 dividend at the end of every year on December 31. Akwasi, as an investor bought shares of the stock on January 1 at a price of GHc25 each, sold one of those shares for GHc27 a year later on the next January 1, and sold the second shares on the following year at the price of GHc24 and finally at the end of the third year sold at GHc 19.5 on January 1. Calculate the geometric return using the time weighted for the three years investment? c) Discuss systematic and idiosyncratic risk in relation to the concept of efficient diversification.​