Relative and absolute error

An approximation

*x**is accurate to precisely 6 decimal places. Does this correspond to an absolute or relative error, and what is its maximum magnitude?

(c) An approximation *x**is accurate to precisely 6 significant figures. Does this correspond to an absolute or relative error, and what is its maximum magnitude?

I know Absolute error of approximation x* to a real number x is given by |x-x*| and relative error is given by .

I am not sure how to use the above to solve the question.

thanks for any help.