Arglly are Bracing of the Big Needed to the following UP 2+ ms Use the Bland's rule to select the erdering and leaving variable at each step. Sing O tableau and the find step's ratio test 42 BV Ratio IM1 2 O $1 0 The entering variable is The leaving variable is Step 1 Tableau: z x1 X2 $2 a3 rhs BV z 0 1 The current basic feasible solution is; X1= X2 Is this basic feasible solution optimal? (type yes or no)