A survey on a sample of 25 new cars being sold at a local auto dealer was conducted to see which of three popular options, air-conditioning (A), radio (R), and power windows (W ), were already installed. The survey found: 15 had air-conditioning (A), 5 had A and P, 12 had radio (R),

9 had A and R, 3 had all three options,11 had power windows (W),

4 had R and W.

Fill in the correct number of cars in each of the eight regions of the given Venn diagram also
Find the number of cars that had:
(a) only W;(b) only A;(c) only R;(d) R and W but not A;(e) A and R but not W ;