The optimal solution of primal problem $($P$)$ is $($x$2,$ X$3,$ e$1)-(16/7,10/7,3/7),$ where er is the excess variable of the first constraint. Using complementary slackness, find the values of dual variables in the optimal solution of the dual problem you wrote in part a$.$ Calculate the optimal objective function value of the dual problem. Compare this value with the optimal objective function value of the primal.