AMC 12B 2016 Problem 10

Past Contests AMC 12 AMC 12B - 2016
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1

A quadrilateral has vertices P(a, b), Q(b, a), R(-a,-b), and S(-b,-a), where a and b are integers with a>b>0. The area of PQRS is 16 . What is a+b ?

Answer Choices
A. 4
B. 5
C. 6
D. 12
E. 13