3) The annual return on Burmah Oil is normally distributed, with a mean of 7.0%. (So the expected return is 7.0%.) You invest $200,000 in this stock for one year. Graph the probably, that after one year, you have a) at least 225,000, b) at most $175,000, as the standard deviation of returns on Burmah runs from 5% to 40%. (Use one graph for this.)