cannot figure out the variance of portfolio, please help!

Consider the following information: a. What is the expected return on an equally weighted pontfolio of these three stocks? Note: Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.9., 32.16. b. What is the variance of a portifolio invested 28 percent each in A and B and 44 percent in C ? Note: Do not round intermediate calculations and round your answer to 5 decimal places, e.g.. 16161