the answers in the boxes are wrong. im not sure how to calculate these.

You've collected the following information from your favorite financial website. 52-Week Price PE Hi Lo 47.80 Div Yld % 1.9 Close Price 62.91 Ratio 235.6 Net Chg -05 64.60 145.94 70.28 1.8 70.9 139.71 .62 171.13 Stock (Div) Abbott 1.12 Ralph Lauren 2.50 IBM 6.30 Duke Energy 3.56 Disney 1.68 139.13 4.3 23.8 145.39 .19 91.80 71.96 4.9 17.6 74.30 .84 113.19 96.20 1.7 15.5 ?? 10 Find the quote for the Duke Energy. Assume that the dividend is constant. a. What was the highest dividend yield over the past year? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. What was the lowest dividend yield over the past year? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) a. Highest dividend yield b. Lowest dividend yield 4.90 % 1.70 %