Consider the polynomials q(x) = x2 + 2x - 13 and r(x) = x3 - 3x. - 1. To plot the function 9(x) over (10,20] we use: a. fplot('x^2+2*x-13'.[10 20]) b. q=sym(x^2+2*x-13) ezplot(q.[10 20]) c. q=[12-13]; x=10:0.1:20: y=polyval(p.x); plot(x,y) d. None of the above 2. To calculate r(2), we use: a. r=[1 0 -3 0); polyval(r.2) b. F=inline("x^3-3x) 1(2) c. syms x =x^3-3x subs(r.x.2) d. all the above