Square and Square Roots

Find the square roots of the following numbers by prime factorization method.
Each of the following numbers is a perfect square-whose square is the given along with the number in each case:
Evaluate:
$$\left( i \right)\,\,\,3\sqrt { - \frac{{512}}{{343}}} $$
$$\left( {ii} \right)\,\,\,3\sqrt {2.197} $$
Find whether the square of the following numbers are even or odd?
$$8204$$
Find : $$64^{\frac{1}{2}}$$