The arithmetic sequence is 4, 7, 10, 13, . . . .

To find the common difference by subtracting successive terms.

So, the common difference is 3.

Add 3 to the last term of the sequence to get the next term.

The next three terms in the sequence are 16, 19 and 22.

The next three terms in the sequence are 16, 19 and 22.