What is the range of the graph?

Ateacher has $80 to buy workbooks. each work book cost $3. if she buys as many workbooks as possible, how much money does she have leftover? a) $2 b) $4 c) $6 d) $8

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

Ineed me i stuck and i don’t want to get it wrong