Security

A B C D

2 3 1 4

1.5 1.3 0.8 0.9 ie 3 1 2 4

Given the preceding data and the fact that RM=8 and M=5 , calculate the following:

(a) The mean return for each security

(b) The variance of each securitys return

(c) The covariance of returns between each security