I cant seem to finish the problem... Please help!

You have $8,000 to invest. You decide to invest $20,000 in Google and short sell $12,000 worth of Yahoo! Google's expected return is 18% with a volatility of 26% and Yahoo!'s expected return is 14% with a volatility of 21%. The stocks have a correlation of 0.95. What is the expected return and volatility of the portfolio? The expected return is 24 %. (Round to one decimal place.) The volatility is %. (Round to one decimal place.)