Problem 6 Based on daily stock prices for the last several years, the rates of return per share for SWA (Southwest Airlines) and United Airlines are both normally distributed. The mean and standard deviation for SWA rate of return are 2.5% and 1% respectively. The mean and standard deviation for United Airlines rate of return are 4.5% and 2% respectively. Assume the rates of return per share for SWA and United Airlines are statistically independent. 6a) There is a 0.2 prob ability that the rate of return for SWA will be greater than what value? (WORK REQUIRED for CREDIT; 6 points)