Need help asap. What's the answer?​

Pls i’m dumb as heck i’ll give y’all so many points if that encourages you

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21