please help!

Please show all your work for maximum credits. 1. Historic demand for a product is a) Using a weighted 3-month moving average with weights of 0.60,0.30, and 0.10 , Find the July forecast. (Note: the most recent period should be given greater weight) b) Using a simple 3-month moving average, find the July forecast c) Using single exponential smoothing with =0.4 and a June forecast = 14 , find the July forecast