Given the following demand data, Perlod Demand 1 56 52 56 51 5 57 Book a. Compute a weighted average forecast using a weight of 0.4 for the most recent period, 0.3 for the next most recent, 0.2 for the next, and 01 for the next. (Round all your answers to two decimal points.) Prive Forecast Period 5 Forecast Period 6 b. If the actual demand for period 6 is 56, forecast demand for pertod 7 using the same weights as in part a Forecast Period 7 0 2 3 4