There are six work mode coice alternatives : drive alone, shared$-$ride with $2$ people, shared with $3$ or more people, transit, bike, and walk. Based on the mode choice model results, answer the following questions.

a$)$ assess the goodness of fits of base model

b$)$ interpret coefficients of base model

c$)$ explain model spectifications and results by comparing base model, model $6$W and $8$W $($focus on travel time and cost coefficients$)$