Just some hints
1. N = 5
2. The function uses an operation related to division.
3. The function is always less than or equal to 5, but never falls below 0.
4. The function is discrete.
5. $ \sum_{n=1}^{5} x[n] = 13 $
6. $ a_0 = \frac{13}{5} $
Just some answers
1.
