What’s the answer to this math question

What point is the projection of q on a) r b) s c) t

Jamie went to home depot. she bought 25 bags of soil that cost $9 per bag. she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each. she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jamie pay at the end?

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?