b$)$ Multifactor productivity for these tires $=0\mathrm{.}0248$ tires$/$dollar $($round your response to four decimal places$).$

c$)$ The percent change in multifactor productivity if Fok can reduce the energy bill by $$950$ per day without cutting production or changing any other inputs $=\%($ente

Note: calculate the new multifactor productivity to four decimal places before calculating the percentage change.