4) The annual return on Ewing Oil is normally distributed, with mean of 6.0%. (So the expected return is 6.0%.) You invest $300,000 in this stock for one year. Graph the probably, that after one year, you have a) at least 335,000, b) at most $288,000, as the annual standard deviation of returns on Ewing runs from 5% to 40%. (Use one graph for this.)