The mean starting salary of recent business graduates at a university is $52,000 with a standard deviation of $16,000. The distribution of starting salaries is assumed to be symmetric and bell-shaped. What proportion of business graduates has a starting salary between $20,000 and $84,000? (Provide your answer in proportion between 0 and 1 for 2 dp) What proportion of business graduates has a starting salary above $68,000? (4dp)