Freight car loading over an 18 week period at a busy port are as follows Week 1 230 2. 250 3. 270 4. 250 5. 270 6. 280 7. 320 8. 370 9. 420 10. 400 11. 450 12. 500 13. 510 14. 520 15. 560 16. 580 17. 600 18. 620 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 loading for Weeks 20 and 21. (Round your final answers to 2 decimals places). C. The manager intends to install new equipment when the volume exceeds 810 loadings per week. Assuming the current trend continues in which week (at the earliest) should the loading volume reach that level? It should reach 810 loading in Week?