Please write a function that computes the square root of an arbitrary positive number. The function should take four arguments, the last three have default values: 1. a a non-negative number to...

Extracted text: Please write a function that computes the square root of an arbitrary positive number. The function should take four arguments, the last three have default values: 1. a a non-negative number to compute the square root of. 2. tol determines when you consider two iterates to be equal. 3. iter_max gives the maximum number of iterations. 4. verbose determines if you want to display intermediate results.