Please show work in detail.

All questions utilize the multivariate demand function for Brand X washing machines given in C2, page 81, initially with:

Initial values are: P_Y = $300 P_L = $0.30 I = $40000 A = $200000

The function is: Q_X = 197000 -100P_X +50P_Y +.025I +.02A + 10000P_L

1.(a). Use the above to calculate thearc price elasticity of demand between P_X = $250 decreasing to P_X = $200. The arc elasticity formula is:

4Q E AP 1 + Q-Y Px E P P.\fa Py EXY aPy