Identify constant, linear, quadratic and cubic polynomials from the following polynomials :
(i) f(x) = 0
(ii) g(x) = 2x3 - 7x + 4
(iii) h(x) = - 3x + 12
(iv) p(x) = 2x2 - x + 4
(v) q(x) = 4x + 3
(vi) r(x) = 3x3+4x2 + 5x - 7
(ii) −6x2