Question 2 The cost [3' of producing a unit of a certain product decreases as C' = E 'u M. where e is the speed of the belt conveyor. Answer the following questions using differentials. a. Estimate the change in C if u is increased by [Ll when 1: = 3. 0 = E * Note 0 c: I] if [3' decreases. h. Estimate the percent change in C if e is decreased by 2% for an arhnitrarj.r value of a. diff ? = E as * Answer in percentage. Negative if it decreases. Question 4 Air at the standard temperature {BEIGE} satises PF L25 = constant where P is pressure in bars and V is 1volume in m3. Find the change in volume Me" if the pressure is ineressed by 3 bars from 136: bars when the 1volume is if: n13. Use linear approximation. "=- dV [Hint Use implieir differentiation to nd E']