A, B, C, D, E and F are cousins. No two cousins are of the same age, but all have birthday on the same date. The youngest is 17 years old and E the oldest is 22 years old. F is somewhere between B and D in age. A is older than B. C is older than D.
Which of the following statement is not possible?
1
F is 18 years old
2
F is 20 years old
3
D is 20 years old
4
F is 19 years old.