7. A sequence is encoded using the LZ77 algorithm. Given that C(a)= l, C(b) = 2, C(r) 3, and C(t)-4, decode the following sequence of triples: (0,0, 3) (0, 0, 1) (0, 0,4) (2, 8, 2) (3,1,2 (0, 0, 3) 6, 4, 4) 9, 5, 4) Assume that the size of the window is 20 and the size of the look-ahead buffer is 10. Encode the decoded sequence and make sure you get the same sequence of triples