Directions (Questions 519 to 523): These questions are based on the following information: Children in a class play only one or two or all of the three games – badminton, football and cricket. 5 children play only cricket, 8 children play only football and 7 children play only badminton. 3 children play only two games – badminton and football, 4 children play only 2 games cricket and football, and another 4 children play only two games – badminton and cricket. 2 children play all the three games. How many children play football as well as cricket? (a) 4      (b) 6     (c) 7      (d) 15    (e) None of these