Find the square root of the complex number $-8-6i$.

Find the square root of the complex number $8-15i$.

Find the square root of the complex number $-11-60\sqrt{-1}$.

Find the square root of the complex number $1+4\sqrt{-3}$.

Find the square root of the complex number $4i$.

Find the square root of the complex number $-i$.

Find the modulus and argument of the complex number $1+i$ and hence express in the polar form.

Find the modulus and argument of the complex number $\sqrt{3}+i$ and hence express in the polar form.

Find the modulus and argument of the complex number $1-i$ and hence express in the polar form.