Arithmetic sequence (1) sl

An arithmetic sequence is given by 4,13,22 (a)  

What is the value of the common difference, d?

An arithmetic sequence is given by 4,13,22 (a)  
Find  $u_{12}$  

An arithmetic sequence is given by 4,13,22 (a)  
Find  $S_{12}$  

An arithmetic sequence is given by 4,13,22 (a)  
Given that  $S_n\ =\ 2167,$  find the value of n.

An arithmetic sequence is given by 4,13,22 (a)  

Given that a_n = 1021, find the value of n.