Answer the following questions?

PLEASE DO IT FAST

1. Find the value of (a) Arg(-6 - 62) (b) Arg(-7) (c) Arg( V(3) - 2) 2. Write -2i 3e4+1 in polar form. 3. Find all the roots of (-16)1/4in cartesian form, exhibit them geometrically, and point out which one is the principal root. 4. Use the e - d defintion of a limit to show that lim (6z - 4) = 2 + 62 z->1+2