May I have the while soultion for question 4(all the sub Q as well) Thanks a lot

Question 4 You invest 60 percent of your funds in stock A and the balance in stock B. The standard deviation of returns on A is 10 percent, and on B, it is 20 percent. Calculate the variance of portfolio returns, assuming: i) The correlation between the returns is 1.0. ii) The correlation is 0.5. iii)The correlation is 0.0 Round your answer to four decimal points