State whether the following statement is TRUE or FALSE. a) When a dual is constructed from the primal. the number of dual constraints is equal to the number of primal variables. b)- In maximization linear programming problems using simplex method. the solution is not optimal when all the values in 012} row are nonnegative. c} A dummy destination is introduced if demand exceeds supply. d)- PERT is a deterministic approach of managing project while CPM is the probabilistic approach of project management. e) Simulation models are useful for economic order quantity problems with constant demand and lead time