Fill in the missing integers.
$\sqrt{49}=7$√49=7 because $\left(\editable{}\right)^{\editable{}}$()$=$=$49$49.
Evaluate $\sqrt{4}$√4
Evaluate $\sqrt{16}$√16
Evaluate $\sqrt{64}$√64
Existence of sqr root (x) for a given positive real number x (visual proof to be emphasized). Definition of nth root of a real number.