Please show all work $($formulas etc...$)$ NO EXCEL. Thank you!!

Suppose you have the following expected scenarios for a stock and bond fund:

a$.$ What is the expected mean return and standard deviation of the stock and bond funds?

b$.$ What is the covariance and correlation between the stock and bond funds?

c$.$ What is the expected return and standard deviation of a portfolio comprised of $60\%$ assets

in the stock fund and the balance in the bond fund?