CoursHeroTranscribedText: Problem 3-7 (Algo) Freight car loadings over an 18-week period at a busy port are as follows: Week Number Week Number Week Number 400 465 13 575 415 495 14 580 LD CO 430 525 15 610 415 10 510 16 625 430 11 540 17 640 435 12 570 18 655 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.) The forecasted demand for Week 20 is and for Week 21 is c. The manager intends to install new equipment when the volume exceeds 980 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 intermediate calculations. Round your final answer to 2 decimal places.) It should reach 980 loadings in Week