A survey on a sample of 35 new cars b eing sold at a lo cal auto dealer was conducted to see which of three p opular options: Air-conditioning (A), Blueto oth (B), and Rear Camera (C), were already installed. The survey found: 18 had A, 13 had B, 12 had C,5 had A and B, 8 had A and C, 6 had B and C, 4 had all three options.
Find the numb er of cars that had:
(a) A and B but not C,
(b) A and C but not B,
(c) B and C but not A;
(d) only one of the options;
(e) at least one option;
(f ) exactly two options;
(g) none of the options.