14.) Table shows historical returns of XYZ company. Calculate standard deviation (sigma) of returns. Year Return (%) 2016 3.7 2017 3.0 2018 I 8.7 2019 3.1 Note: Round your answer to nearest hundredth, have two digits after decimal place. Write the answer without "%" sign. For example, if standard deviation is 1.22222%, write 1.22 15.) The project cost of capital is also known as: Select one: a. The discount rate b. The capital gains yield C. The required rate of return on shares d. The yield to maturity