Someone help me this is my last page and i dont know what to do, i will award a lot of points to whoever answers them all. would a 100 be enough?

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

What is the percentile for data value 6 in the following data set? 4 13 8 6 4 4 13 6 4 13 2 13 15 5 9 4 12 8 6 13 40 25 35 62