Common-size and trend percents for Rustynail Company's sales, cost of goods sold, and expenses follow. Common-Size Percents Trend Percents 2018 2017 2016 2018 2017 2016 Sales 100.0 % 100.0 % 100.0 % 105.1 % 103.9 % 100.0 % Cost of goods sold 63.5 61.3 56.9 117.3 111.9 100.0 Total expenses 14.4 13.9 14.2 106.7 101.7 100.0 1. Determine the net income for the following years. 2. Did the net income increase, decrease, or remain unchanged in this three-year period