I am so lost, I think I'm overthinking/overreacting but I'm having way to much trouble on this. Answer the following questions for f(x) = x4 - 3x3 - 4x2 + 18x - 12

A.) How many total zeros does this function have?

B.) Using p/q, list all possible rational zeros.

C.) Using Descartes' Rule of Signs, how many possible positive, negative, and complex (imaginary) zeros are possible... list all possibilities.

D.) Find all the zeros to this function. Show your work/ thought process.