I need help, what do I put into formula bar in Excel?

Calculating the expected return on a portfolio, given the share in the risk-free asset, the T-bill rate, and the market risk premium 65% T-bills What is the expected return and beta on a portfolio tha 35% market portfolio and If the risk free rate is 0.4% and the market risk premium is 8.1% T-bills Market portfolio Shares 65% 35% Return Risk Premium Beta 0.4% 0 0 8.1% 1 E(Rp)= Portfolio beta=! Calculating the beta of a portfolio that mixes the risk-free asset and the market portfolio, using the security market line (SML) 6.2% What is the beta of a portfolio with an expected return 10.5% if the T-bill yield is and the market risk premium is 8.3% T-bill rate= 6.2% Market risk premium= 8.3% E(Rp)= 10.5% Portfolio beta