Just need part d and e solved.

so answers to part a and b can't be used to solve it?

Check my work 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.) July. (Do not round intermediate calculations. Round your e. Using the regression equation in d, calculate answer to 1 decimal place.) ences July forecast Check my work Historical demand for a product is: DEMAND January February March April May June oped Pook a. Using a weighted moving average with weights of 0.50 (June), 0.20 (May), and 0.30 (April), find the July forecast. (Round your answer to 1 decimal place.) int Print July forecast 17.6 rences b. Using a simple three-month moving average, find the July forecast. (Round your answer to 1 decimal place. July forecast 17.6 c. Using single exponential smoothing with a = 0.20 and a June forecast = 12, find the July forecast. (Round your 1 decimal place.) July forecast 13.2