What aspect of web design is gloria following when she uses the same color scheme throughout a web page?

a. alignment
b. proximity
c. contrast
d. repetition

1. define independent-set as the problem that takes a graph g and an integer k and asks whether g contains an independent set of vertices of size k. that is, g contains a set i of vertices of size k such that, for any v and w in i, there is no edge (v,w) in g. show that independent-set is np-complete.