Farid is exploring adding mapplewood limited to his stock portfolio. he looked at estimates of the firm's cost of equity from several analysts. standard & poors thought it would be 19.70%, market edge gave a value of 18.40% and thompson financial estimated 20.7%. is he applies and equal weight to all these estimates, what should farid use as the cost of equity for mapplewood limited?

if you could please show your work, thank you.