consider the following LPP
max z=9x1+8x2+5x3
subject to 2x1+3x2+x3<_4
5x1+4x2+3x3<_11
x1,x2,x3>_0
(a)solve using simlex method
(b)hence using the sesitivity analysis,find the new optimal solution of the LPP if the availability of the second constraint is changed from 11 to 15