Can somebody tell me how to solve this problem?

An investment banker determined a plan for his client. His client has $40,000. This money will be invested in the following assets: What is the expected rate of return on this portfolio? An investment banker determined a plan for his client. His client has $40,000. This money will be invested in the following assets: If the correlation coefficient between growth and income stock is 0.6. between T-notes and income stock is 0.4, and if all other correlation coefficients are zero, what is the standard deviation of this portfolio