I've completed the calculations. All I need is the explanation for both. Thanks!

1. These three chemical companies have the following stock options outstanding and total common shares outstanding a. Calculate the options to shares outstanding percentage for fiscal year 2016 (in millions) DuPont Dow PPG Stock Options Outstanding Shares Outstanding Options to Shares Outstanding 4.794 867.03 0.55% 34.77 1220 2.85% 3.881556 256.2 1.52% b. The chemical companies have the following net income and pro forma income numbers. Calculate the difference and percentage difference as if stock options were treated as an expense DuPont Dow PPG Net Income - Reported Net Income Pro forma Difference % Difference 2513 2859 346 13.77% 4318 3948 370 -8.57% 877 745 132 15.05% How significant is the potential dilution of stockholders' equity for these three chemical companies? Explain