11. Graphing Complex Numbers

Express the complex number $z=7+11i$ in polar form.

Express the complex number $z=2-4i$ in the polar form.

Express the complex number $z=1-\frac{\sqrt{3}}{3}i$ in polar form.

Convert the complex number $z=12\(\left\)(\(\cos\)90\(\degree\)+i・\(\sin\)90\(\degree\)\(\right\))$ from polar to rectangular form.