Please andwer 20, 21, and 22

Question 20 (4 points) The four factors that affect the cost of money are: Question 21 (5 points) Using the following table, please calculate a expected rate of return b variance C. standard deviation d. coefficient (round to nearest 1000th. Example: 678) Outcome Probability Return Excellent 0.15 0.55 Good 0.45 0.25 fair 0.35 0.15 Poor 0.05 -0.15 Question 22 (5 points) Please name and describe the contributions made to portfolio theory from Harry Markowitz, Evans/Archer, and Fama/French