Instructions: Use the following scenario and data for questions 1 to 10. Groff Kitchen LLC makes two types of barbeque grills. The availability of three scarce resources limits the production of the grills. The profit contribution, resource usage per unit of each grill, and availability of the resources are given in the following table: The decision variables used in the linear programming model are: x1 Number of units of grill 1 to produce x2 - Number of units of grill 2 to produce The linear programming model and the graphic solution are given in the following Max 15x1+12x22x1+3x21804x1+2x22007x1+6x2420x1,x20 s.t Keeping c1 constant at c1=15, the interval for c2 in which the current optimal solution remains optimal is 790c2215907c2152152c2907215c2790 none of the above