In the complex plane, what is the length of the diagonal of the square with vertices $4$, $3+5i$, $-2+4i$, and $-1-i$?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
In the complex plane, what is the length of the diagonal of the square with vertices $4$, $3+5i$, $-2+4i$, and $-1-i$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
2\sqrt{13}
In the complex plane, what is the length of the diagonal of the square with vertices $4$, $3+5i$, $-2+4i$, and $-1-i$?
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