1. The following Venn diagram was created from recording each car in a dealer's lot. The universal set U={Cars in the lot), N = {new cars in
the lot), and 4-D = {cars with 4 doors in the lot)

I. The 20 cars are new and don't have 4 doors
II - Those 32 cars are new and have four doors.
III - These 15 cars are used and have four doors.
IV - These 7 cars are used and don't have four doors.
a. How many were new cars?
b. How many cars were in the lot?
c. How many new cars had 4 doors?
d. How many cars were used?
e. How many cars were either new or had 4 doors?
f. How many cars were either used or had 4 doors?
g. What could you say about the 7 cars in the lower right corner of the
diagram?