b. Use the above trend equation to predict expected loadings for Weeks 20 \& 21. (Round your final answers to 2 decimal places.) c. The manager intends to install new equipment when the volume exceeds 870 loadings per week. Assuming the current trend continues, in which week (at the earliest) should the loading volume reach that lever? (Use the rounded answers, as required, from any previous part of this problem. Do not round any other intermediate calculations. Round your finat answer to 2 decimal places.) The table below shows actual and forecasted nubmers of accounts serviced by a company. Compute MAD, MSE, and MAPE for the following data, showing actual and forecasted numbers of accounts serviced. (Enter whole number values in the table below for Error, IErrorl, and Error^2. Round the IErrorl/Actual to three decimals. Enter 0 where necessary, do not leave any cells blank. Negative values should be indicated with a minus sign, i.e. -2. Round MAD MSF amd MAPE to 3 decimal places, Freight car loadings over an 18 -week period at a busy port are as follows: Click here for the Excel Data File a. Determine a linear trend line for expected freight car loadings. (Round your intermediate calculations and final answers to 2 decimal places.) b. Use the above trend equation to predict expected loadings for Weeks 20&21. (Round your final answers to 2 decimal places.)