GreenTech Corp., an electronics manufacturer, has provided data for two consecutive years regarding their production metrics:

$\backslash$table$[[$Metric$,$Last Year This Year,$],[$Number of Workers,$100,100],[$Total Units Produced,$50000,50000],[$Total Labor Hours,$22000,20000],[$Capital Investment,$1000000,1100000],[($$$),,],[$Raw Materials Cost,$55000,40000]]$

$($$$)$

A$.$ Calculate labor productivity for this year in terms of units produced per labor hour.

B$.$ Calculate labor productivity for last year in terms of units produced per labor hour.

C$.$ For this year, calculate multifactor productivity considering both labor hours and raw material costs as inputs. Use units per combined dollar of labor $($assuming $$\frac{20}{?}$ hour$)$ and material as the output.

D$.$ Using your labor productivity calculations from Parts A and $B,$ determine the labor productivity growth rate from last year to this year. Provide the growth rate as a percentage.