Use the commission schedule from Company A shown in Table 2 to find the annual rate of interest earned by each investment in Problems 71 and 72. An investor purchases 200 shares at $14.20 a share, holds the stock for 39 weeks, and then sells the stock for $15.75 a share. An investor purchases 450 shares at $21.40 a share, holds the stock for 26 weeks, and then sells the stock for $24.60 a share. Use the commission schedule from Company B shown in Table 3 to find the annual rate of interest earned by each investment in Problems 73 and 74. An investor purchases 215 shares at $45.75 a share, holds the stock for 300 days, and then sells the stock for $51.90 a share