Please help for 20 points!! Please do a) b) and c)!

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.