Consider the sequence of numbers a1, a2, a3, a4,.....to infinitywhere a1=81.33 a2=-19 and a(j)=a(j-1)-a(j-2) for all j>=3, What is the sum of first 6002 terms of the series?CAT 2004

1) -100.33
2) -30
3) 62.33
4) 119.33