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Q.7 (a) Construct the dual of the problem Maximize Z= 3x1 1!x" "x3 #ub$ect to "x1 3x" "x3 %=7 3x1 & "x" 'x3 =3 x1(=!) x"(=!)x3(=! (b) Maximize Z= *x1 +x" sub$ect to 3x1 *x" %=1+ *x1 3x" %= 1' x1)x" (=! (1!) Q., -xplain follo.in/ for a transportation problem (a) 0east cost method (b) 1o/el2s approximation method (c) 3e/enerac4 (d) M536 method (1!)