Metal cans are either of the two-piece variety (in which the bottom and sides are integral) or the three-piece variety (in which the sides, the bottom, and the 3pare each separate pieces). For a three-piece can and assuming that it can be considered as a thin-walled, internally-pressurized vessel, should the seam be (a) in the rolling direction, (b) normal to the rolling direction, or(c) oblique to the rolling direction of the sheet? Explain your answer, using equations from solid mechanics.