I am really stumped on answering this Discrete Mathematics Question

Question

Let U={0,1,2,3,...,19}. Select the bit-string that represents the subset {1,3,5,7,11,13,17,19}, using the convention that the right-most bit represents the element 19. 

Answer 1

1 means the value is IN the set

0 means the value is NOT in the set

01010101000101000101