Historical demand for a product is as follows: DEMAND 58 April May June July August September 88 68 93 88 a. Using a simple four-month moving average, calculate a forecast for October (Round your answer to 2 decimal places.) Forecast for October b. Using single exponential smoothing with a-020 and a September forecast 54. calculate a forecast for October (Round your answer to 1 decimal places.) Forecast for October Forecast for Odobe Check my wor c. Using simple linear regression, calculate the trend line for the historical data. Say the Xaxis is April - 1 May - 2, and so on while the Yaxis is demand. (Round your intercept value to the nearest whole number and slope value to 2 decimal places.) d. Calculate a forecast for October using your regression formula (Round your answer to 2 decimal places.) Forecast for October