Please answer 3 and 4 thoroughly and clearly

3. A company has asked you to evaluate the firm's productivity by comparing this year's performance with last year's. The following data are available: three (a) Has the company improved its productivity during the past year in all the categories? Explain your results in percentage terms. (b) Which category shows the greatest increase and which shows the least? 4. The CEO has asked you to evaluate the firm's productivity by comparing performance a available: month from last year and equivalent month this year. The following data are The CEO determines his costs to be as follows: - Labor $20 per hour - Utilities $1.50 per BTU - Capital 5\% per month of investment. Show the productivity change, for one month last year versus one month this year, on a multifactor basis