Electric Potential: Is My Answer Correct?

[asi123]

Homework Statement

Hey guys.
So I got this question in the pic and also the answer I got.
I didn't upload the entire solution because I don't have my scanner until Sunday.
I'm not so sure about the solution and I bet some of you have already seen this question and solved it.
So my question is, is the answer correct?

10x.

Homework Equations

The Attempt at a Solution

 

[Hootenanny]

Homework Statement

Hey guys.
So I got this question in the pic and also the answer I got.
I didn't upload the entire solution because I don't have my scanner until Sunday.
I'm not so sure about the solution and I bet some of you have already seen this question and solved it.
So my question is, is the answer correct?

10x.

Yes, your final answer is correct.

 

[asi123]

Yes, your final answer is correct.

10x.