Week $1$Week $2$Week $3$Week $4$Units Produced $1,1771,3061,088985$Labor $($S$)$m$12,37514,89210,5639,576$Material $($S$)$m$20,57724,57320,49218,364$Overhead $($S$)$m$9,15110,4808,6867,798$MGMT$4105$ Problem Solving Assignment #$1[5$ x $20=100$ marks$]1.$ At Roberts, the output of a process is valued at $$90$ per unit. The cost of labor is $$45$ per hour including benefits. The accounting department provided the following information about the process for the past four weeks:a$)$ Calculate the multifactor productivity ratio for week $1,$ week $2,$ week $3$ and week $4.$b$)$ Use the multifactor productivity ratio to see whether recent process improvements had any effect and, if so$,$ when the effect was noticeable.c$)$ Calculate the labor productivity ratio for week $1,$ week $2,$ week $3$ and week $4.$D$.$ Has labor productivity changed? E$)$ use the labor productivity ratio to support your answer