For the given sales data for a car each month No. of Month Gars 1 40 NI 47 3 4 43 52 59 64 5 6 7 62 8 65 9 68 10 72 Calculate forecast for the 11th month (F11), using: a) Simple moving average MA. b) Four points moving average MA.. c) Four points weighted moving average MAwa using weights (0.4, 0.3, 0.2, 0.1). d) Exponential smoothing with error factor o = 0.35 (smoothing factor)