Consider the simplex tableau given below. X1 X2 X3 S 4 01 0 -2 20100 80119 $2 $3 P 3 3 0 0 -5 0 0 0 27 3 1 0 30 3 0 1284 11 15 43 (A) Which variables are basic variables? X2, X3, $3, and P OX1, X2, X3, and s S1, S2, S3, and x OX2, X3, 51, and P Which variables are nonbasic variables? Ox1, S1, and $2 Ox1, x2, and x3 Ox, S. and P OS1, S2, and s (B) Determine each of the values 20