Share X and Share Y have the following returns with their respective

probabilities.

Share X Share Y

Return Probability Return Probability

$10\%0\mathrm{.}315\%0\mathrm{.}3$

$5\%0\mathrm{.}31\%0\mathrm{.}4$

$-4\%0\mathrm{.}4-10\%0\mathrm{.}3$ Assume the correlation between the two shares is $0\mathrm{.}5.$ Calculate the portfolio

risk and return based on the following combinations:

Portfolio $1$: $70\%$ invested in Share X$,30\%$ in Share Y

Portfolio $2$: $50\%$ invested in Share X$,50\%$ in Share Y