Could someone please help me solve these questions?

What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83