Two super difficult math problems in grade four, please! Practical questions

Two super difficult math problems in grade four, please! Practical questions

Xiaoming is 8 years old, his father is 37 years old and his mother is 35 years old. A few years later, his parents will be 6 times as old as Xiaoming?
Six years later
Fifteen years ago, the father's age was seven times that of his son. Ten years later, the father's age is twice that of his son?
Father 50, son 20