Calculate the investment performance of these two portfolios:

Portfolio #$1$ What is the one year performance of a $50\%/50\%$ mix of stocks and bonds with stocks earning $8\mathrm{.}5\%$ and bonds $3\%?$

Portfolio #$2$: What is the one year performance of a $75\%/25\%$ mix of stocks and bonds with stocks earning $-5\%$ and bonds $2\mathrm{.}5\%?$