Consider the sequence \(1, 7, 13, 19, \ldots, 6n + 7\text{.}\)

1. How many terms are there in the sequence? Your answer will be in terms of \(n\text{.}\)

2. What is the second-to-last term?

3. Find the sum of all the terms in the sequence, in terms of \(n\text{.}\)