Consider the simplex tableau given below. xX2 X3 3 0 1 0 1 0 -4 0 0 4 0 0 -5 5334 24052 $2 SOOTO $3 0 NOOOT Z 0 14 0 28 0 21 1 15 X1, X2: X3, and X3 Which variables are nonbasic variables? x3, S3, and z X. Sq and $2 X. x3. and $1 X2, X3, and S3 (B) Find the basic feasible solution determined by setting the nonbasic variables equal to zero and then solving the basic variables.