Question 2 Resolve the problem using Excel MaxZ- X1 X2 X3 X4 4X1 X2 X4-7 2X2+X3+X4-9 X1,X2.X3,X4>- I Find the optimal solution - X1= x2=> X3- X4= Zmax= I If we change XI,X2,X3,X4>-0 by All x's are integer. Find the new optimal solution X1= - - X2- X3= X4= Zmax = 10 Points