Math, help pls

Which choice represents the sample space ,s for this event

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.