Help me please i dont understand how to use venn diagrams

Question

In a certain town there lived 156 men: 96 are married; 81 have a telephone; 79 own a car; 64 are married and have a telephone; 43 have a telephone and a car; 52 are married and have a car; and 37 are married, have a car, and have a telephone.

 

 

How many men are single and do not have either a car or a telephone?

Answer 1

22 single men with no car & no phone

156 - sum of a through g = 156-134 = 22