Given the following adjacency matrix, what is the approximate rank vector after one iteration of the power iteration method (use PageRank model with beta=1)? a) [5/18, 5/18, 4/9]'
b) [1, 0, 0]'
c) [1, 2, 3]'
d) [1/2, 1/3, 0]'

Which of the following exceptions could occur when the following code is run, if the precondition is met? // precondition: a is not null public string dosomething(arraylist a, int b) { int i; string s; for (i = 0; i < = a.size(); i++) { s = (string)(a.get(i)); if (s.length() == b) { return s; } } return null; }