A manufacturer produces items with a rectangular base. Let random variables denote the respective length (X) and width ()) of the rectangle (in cm). Suppose X and Y are independent with the following parameter values. t of E(X) = 4, Var(X) = 0.11, E()) = 9, Var()) = 0.34 The perimeter is then defined as 2X + 2Y. (Round your answers to 4 decimal places, if needed.) (a) What is the mean of the perimeter of the rectangle? (b) What is the standard deviation of the perimeter of the rectangle? Check Last saved at 17:15:29 Next page Progress Previous page