State of Prob. of the Rate of return if state occurs

the economy state of economy Stock A Stock B

Boom $0\mathrm{.}400\mathrm{.}150\mathrm{.}05$

Bust $0\mathrm{.}60-0\mathrm{.}050\mathrm{.}05$

$1.$ What is the expected return of a portfolio with $75\%$ in asset A and $25\%$ in Asset B$?$

$2.$ What is the variance of the portfolio with $75\%$ in asset A and $25\%$ in Asset B$?$