Can you help me with these exercises 1. z1=cos*pi/8+i*sin*pi/8;
z2=1+i √3
(z1*z2)^8=?
2.Solve in C ecuation z^4+81=0
3.Solve ecuation x^3-4x^2+x+6=0

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters