Use the following returns for X and Y$.$

Year $1$: X $=13\%$ Y $=27\%$

Year $2$: X $=26$ Y $=36$

Year $3$: X $=7$ Y $=11$

Year $4$: X $=-5$ Y $=-29$

year $5$: X $=11$ Y $=16$

a$.$ Calcu;ate the arithmetic average returns for X and Y$.$

b$.$ Calculate the variances for X and Y$.$

c$.$ Calculate the standard deviations for X and Y$.$