1. Try to guess what elsif and else are doing.
elsif is like alternative to if. Else is when none of the if and elsif works.
2. Change the numbers of cars, people, and trucks and then trace through each if-statement to see what will be printed.
Different codes from the elsif statement will run.
3. Try some more complex boolean expressions like cars > people || trucks < cars.
Done, like 28-34
4. Above each line write an English description of what the line does.