Answer the question based on the picture below:

. .9.12 Stanford Rosenberg Computing wants to establish an assembly line for producing a new product, the Personal Digital Assistant (PDA). The tasks, task times, and immediate predeces sors for the tasks are as follows: IMMEDIATE TASK TIME (sec) PREDECESSORS A 12 B 15 A C 8 A D 5 B, C E 20 D. 4.50 City government has collected the following data on annual sales tax collections and new car registrations: ANNUAL SALES TAX COLLECTIONS 1.0 1.4 1.9 2.0 1.8 2.1 23 (IN MILLIONS) NEW CAR REGISTRATIONS 10 12 15 16 14 17 20 (IN THOUSANDS) Determine the following: a) The least-squares regression equation. b) Using the results of part (a), find the estimated sales tax collec tions if new car registrations total 22,000 c) The coefficients of correlation and determination, PX