Yose Errors in Magic of Go

In Rob Van Zeijst's Magic of Go column(#161) all three yose problems have errors. They are typical of the errors that you see in yose books. The tesuji is correct, but the proposed solution contains at least one error related to the size of the play.

Here are the three problems:

Problem 1  

Black to play.

Wrong solution
Solution

Issue 160 Problem 2  

Black to play.

Wrong solution
Solution

Issue 160 Problem 3  

Black to play.

Wrong solution
Solution

-- BillSpight