FE.Z. Stock Levels and Number of Models 0/2 points (graded) Instructions: Answer all the questions and click Submit A company that manufactures and sells guitars made changes in their product range. From the start they had 20 models. Then they reduced the number of models to 15, As a result, the company enjoyed a 10% increase in turnover. Za. How much did the stock level change? Enter the correct number (in %, with one correct decimal) in the input field. Inspired by the success, suppose the company aim for another 20% increase in turnover and with the same change in stock level as the last time they reduced the number of models. Zb. How many models should the company go for this time? Enter the correct integer number in the input field. (Round off to the nearest integer.) models X