List of 10 integers has been written down: N1, N2, N3,...,N10 which lies between 1

[naomi]

and 50 inclusive? A) let S be a nonempty subset of list of entries. show that if i add up the integeres in S then the total lies between 1 and 500
B) show thast it is always possible to find two different subsets S andS' of the list of entris such that the sum of the integers in S equals the sum of the integers in S'

can anybody help with this? in part a I am assuming that 50c10 is a subset but not sure where to go from there please help