Suppose that the first goal in a gp problem is to make 3 x1 + 4 x2 approximately equal to 36. using the deviational variables d1- and d1+, the following constraint can be used to express this goal. 3 x1 + 4 x2 + d1- - d1+ = 36. if we obtain a solution where x1 = 6 and x2 = 2, what values do the deviational variables assume?