Given the following array representations of binary heaps, select all of the binary heaps that are max-heaps.

1. [5,44,8,60,103,9]

2. [76,5,60,5,16,34,61]

3. [61,98,66,106,99,99,106]

4. [105,66,101,5,20,100,14]

5. [4,5,60,9,12,107,61]

which one is correct answer? Given a binary heap of A[1..149], what is the index of the right child of element A[51]? Add your answer as a number in the box below.