As part of a study for the Department of Labor Statistics, you are assigned the task of evaluating the improvement in productivity of small businesses. Data for one of the small businesses you are to evaluate is shown below. The data are the monthly average of last year and the monthly average this year. Determine the multi$-$factor productivity using the following costs:

$\backslash$table$[[$Labor$,8$ per hour,$],[$Capital$,8\mathrm{.}3\%$ per month,$],[$Energy$,0\mathrm{.}6$ per BTU,$],[,],[,$Last Year,This Year$],[$Production$,1,500,1,500],[$Labor$,350,325],[$Capital$,15,000,18,000],[$Energy$,3,000,2,750]]$

Complete calculation inside highlighted question cell

Last Year This Year

a$.$ What is the percent change in the labor productivity? $[$Blank$1]\%$

b$.$ What is the overall multi$-$factor productivity change? $[$Blank$2]\%$