Answer:
(1) 17 (2) +3 every new term (5+3) or 8+3) or 5+x*3
we can use this as to find 2nd number (1) as its first one to be found 5+3(1) 5+3=8
(3) 5+9*3=5+27 , 32
(4) 5+9*3 ,
we can test this out by counting
starter: 5
1 -> 8
2-> 11
3-> 14
4 -> 17
5 -> 20
6 -> 23
7 -> 26
8 -> 29
9 -> 32 (realisticly it is still the 10th but it's the 9th after the 1st.)
Explanation: