Freight cat loadings ovet an 18 -week period at a busy port are as follows. 0. Determine a linear trend line for expected freight car loadings. (Round your intermediate calculations and final answers to 2 decimal pleces.) b. Use the above trend equation to predict expected loadings for Weeks 20&21 (Round your finol answers to 2 decimal places.) The forecasted demand for Week: 20 is c. The manager intends to install new equipment when the volume exceeds 920 Jading pee week Asguming the current trend continues, in which week fat the earliesi) should the loadang volume reach thot leyer? (Use the rounded answers, os required, from any previous part of this problem. Do not round any other intermediote caiculations Round your final onswer to 2 decimal a. Determine a linear trend line for expected freight car loadings. (Round your intermediate calculations and final answers to 2 decimal places.) Y= b. Use the above trend equation to predict expected loadings for Weeks 20&21 (Round your final answers to 2 decimal pleces.) The forecasted demand for Week 20 is and for Week 21 is c. The manager intends to instait new equipment when the volume exceeds 920 loadings per week. Assuming the current trend continues, in which week (at the earliest) should the loading volume reach that level? (Use the rounded answers, as required, from any previous part of this problem. Do not round any other intermediote colculations. Round your final answer to 2 decimal pleces.) It should reach 920 loadings in Week