City X has recently conducted a travel survey of its 10 TAZS in 2013. The collected data are summarized in the following Table. Zone # 123456789 10 Observed Trips and Zonal Activity Households Daily Trips X P 6050 2124 7120 4000 6660 1988 8550 5997 8064 4290 8730 5967 9792 6696 10368 7320 9952 8400 10166 9159 Population X 11480 12915 10906 14350 13776 15785 15211 15785 16646 14240 Based on the given information: a) Relate P (total trips produced by a zone) to X (zonal population). Plot P vs. X and the line representing P = bo + bX. b) Relate P (total trips produced by a zone) to X (zonal households). Plot P vs. X and the line representing P = bo' + b'X2. c) Comparing R2 values between two models obtained from Questions (a) and (b), which one is more preferable? Why? d) Given Tables 1 and 2 for a simple four-zone study area (zones 6, 7, 8, and 9) in City X in 2023: