help me!!!!!!!!!!!!

Problem 18-15 (Algo) Historical demand for a product is January February March April May June DEMAND 15 12 16 15 17 16 e. Using a welghted moving average with weights of 0.50 (June). 0.30 (May), and 0.20 (Aprin), find the July forecast. (Round your answer to 1 decimal place.) Duly forecast b. Using a simple three-month moving average, find the July forecast (Round your answer to 1 decimal place.) July forecast c. Using single exponential smoothing with a -0.40 and a June forecast - 12, find the July forecast. (Round your answer to 1 decimal place.) July forecast d. Using simple linear regression analysis, calculate the regression equation for the preceding demand data. (Do not round Intermediate calculations. Round your Intercept value to 1 decimal place and slope value to 2 decimal places.) e. Using the regression equation in d. calculate the forecast for July (Do not round Intermediate calculations. Round your answer to 1 decimal place.) July forecast