#### Answer

(i) The sequence is arithmetic.
(ii) The next two terms are: 23 and 28.

#### Work Step by Step

A sequence is:
(a) arithmetic if there is a common difference among the terms.
(b) geometric if there is a common ratio among the terms.
Notice that the given sequence has terms that increase by 5.
This means that the sequence has a common difference of 5.
Thus, the sequence is $\underline{\text{arithmetic}}$.
The next two terms can be found by adding 5 to the previous term. Therefore, the next two terms are:
$23 \text{ and } 28$