The first term of an arithmetic sequence is $2$. The sum of the third and the sixth terms is $25$. What is the fourth term?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
The first term of an arithmetic sequence is $2$. The sum of the third and the sixth terms is $25$. What is the fourth term?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
11
The first term of an arithmetic sequence is $2$. The sum of the third and the sixth terms is $25$. What is the fourth term?
train