Identify constant , linear quadratic , cubic and biquadratic polynomials from the following. (i) `-7+x` (ii) 6y (iii) `-z^(3)` (iv) `1-y-y^(3)` (v) `x-x^(3)+x^(4)` (vi) `1+x+x^(2)` (vii) `-6x^(2)` (viii) `-13` (ix) `-p`