Martin Manufacturing has implemented several programs to improve its productivity. They have asked you to evaluate the firm's productivity by comparing this year's performance with last year's. The following data are available: Last Year 10,500 units 12.000 Output Labor Hours Utilities Capital This Year 12,100 units 13,200 $8,250 $88,000 $7,600 $83.000 a. What is the percent change in labor hours this year vs. last year? 4.76% b. What is the percent change in utility cost this year vs. last year? 6.16% c. What is the percent change in capital investment this year vs last? [Select] > d. What is the overall multi-factor productivity for last year? Select c. What is the overall multi-factor productivity this year Select f. What is the multi-factor percent change this years last year Select