Suppose we have a piece of metal sheet of length l = 5.8 cm and width W = 10.7 cm to make a capacitor. (a) If we cut it in two equal halves and make it into a parallel capacitor with plate separation d = 0.4 cm, find the capacitance in pF. 6.35 Find the area of each plate after the sheet is cut in half, and use that in the expression for the capacitance of a parallel-plate capacitor. PF (b) If we cut it into two sections with widths 21 and 2nb instead (a <b), and roll them up to form a cylindrical capacitor with two shells separated by the same distance d radially, find a and b (in cm). cm cm (c) Find the capacitance of this cylindrical capacitor in pF.