Questid Sandy purchased a stock that is expected to earn 10.5% in a booming economy, 2% in a normal economy, and lose 5.75% in a recessionary economy. The probabilities of a boom, a normal economy, and a recession are 27%, 52%, and 21%, respectively. What is Sandy's expected rate of return on this stock? 0 2.668% O 6.298% 0 7.583% O 5.486% O 4.218%