There are two states of the world tomorrow. With probability 1/6, the economy will be good. With probability 5/6, the economy will be bad. IBM stock return will be 15% if the economy is good, 1% if the economy is bad. Dell stock return will be 25% if the economy is good, 10% if the economy is bad. You own $1,000 of IBM and $3,000 of Dell. What is the expected return of your portfolio? What are the covariance and correlation of IBM and Dell stock returns? What is the variance of your portfolio?