Please assist me with these Alg 2 problems

Answer:
[tex]\displaystyle a_n = a_{n - 1} + 7[/tex]
[tex]\displaystyle 4, 7, 10, 13, 16[/tex]
Step-by-step explanation:
A recursive formula is just a computation of all previous term in a sequence, in order to find value of [tex]\displaystyle a_n.[/tex] So, here is the recursive formula for arithmetic sequences:
[tex]\displaystyle a_n = a_{n - 1} + d \\ \\ a_n = a_{n - 1} + 7[/tex]
I hope that the first answer is correct, and as always, I am joyous to assist anyone at any time.