The closed box with the square end x inches on the side is to be mailed. U.S postal service will accept box for domestic shipment only if length L of box plus its girth (4x) is at most 108 inches.( a) State volume V of box as a function of x. b. find restrictions of x.C. use the grapher to sketch graph of function from part (a) incorporating restrictions from part b. d. use the grapher to find value of x for which volume is the maximum. also determine maximum volume.