Can anyone solve the following for me?

a newly arrived migrant intends to place one quarter of his funds in real estate and the remaining three quarters in a portfolio of share. the real estate venture has an expected rate of return of 28% with a standard deviation of 20%. While the share portfolio has an expected return of 12% with a standard deviation of 6%. Assume the returns on these two investments are independent.

a) What are the expected value and the standard deviation of the return of the total funds invested?

b) using the variance of the possible returns on an investment as a measure of its relative riskiness, rank the real estate venture, the share portfolio and the combination of the 2 in order of increasing riskiness