4. A sample poll of 128 voters revealed the following information in favor of three candidates A, B and C of a certain party in Agbarha - Otor. 25 were in favor of A alone. 66 favored B, 18 favored C alone. 9 were sitting on the fence. 39 were in favor of exactly two candidates. 72 were in favor of exactly one candidate. 30 were in favor of candidate A and at least one other candidate. How many people were in favor of a. Both A and C b. B and C only c. A or B​