Solve the following problems:
1. The rectangular coordinates of a point are given. Find out the polar coordinates of the points. Express θ in (-5, 5)
2. Plot the complex number.
z = 4 + 5i
3. Find the absolute value of the complex number.
z = 5i
4. Write the complex number in polar form. Express the argument in degrees.
z = 5i
5. The polar coordinates of a point are given. Find the rectangular coordinates of the point.
(-4, 135o)