Four young children ARE seated next to each other on a bench.The child on the left cann0t be older than the child on the right .The ages of the 1st and 3rd children differ by 8 years .No child is bel0w 2 years old ,neither any of them is older than 10 years old.The 2nd child is 7 years younger than the 4th child .what are the ages of the four children