Please show how this can be calculated in detail through excel, with excel formulas shown. Thank you!

Problem 3-7 (Algo) Freight car loadings over an 18-week period at a busy port are as follows: Week Week Week Number Number 370 Number 415 7 13 450 380 8 425 14 455 390 9 435 15 475 380 10 425 16 485 390 11 435 17 495 6 395 12 445 18 505 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.) = t 12345 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 950 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 950 loadings in Week 1 2 3 4 5 6 7 8 9 10 11 A Week TN56 1 2 3 4 B Number 370 380 390 380 390 395 C Week 7 8 9 10 11 12 D Number 415 425 435 425 435 445 E Week 13 14 2618 15 17 F Number 450 455 475 485 495 505 G H