Identify constant, linear, quadratic, cubic and quartic polynomials from the following.
(i) −7+x
(ii) 6y
(iii) −z3
(iv) 1−y−y3
(v) x−x3+x4
(vi) 1+x+x2
(viii) −6x2
(viii) −13
(ix) −p
(ii) −6x2