A box has a square base of x and height h a) find the dimensions x, h for which the volume is 18 and the surface area is as small as possible (use symbolic notation and fractions where needed)...

A box has a square base of x and height h

a) find the dimensions x, h for which the volume is 18 and the surface area is as small as possible

(use symbolic notation and fractions where needed)

x=_______________________

h=________________________

b) find the dimensions x, h for which the surface area is 18 and the volume is as large as possible

(use symbolic notation and fractions where needed)

x=_______________________

h=________________________