Solve each problem. A comprehensive graph of ƒ(x)=x⁴-7x³+18x²-22x+12 is shown in the two screens, along with displays of the two real zeros. Find the two remaining nonreal complex zeros.

Determine if the given function is a polynomial function. If so, write in standard form, then state the degree and leading coefficient. $f\(\left\)(x\(\right\))=4x^3+\(\frac\)12x^{-1}-2x+1$

Determine if the given function is a polynomial function. If so, write in standard form, then state the degree and leading coefficient. $f\(\left\)(x\(\right\))=3x^2+5x+2$

Determine the end behavior of the given polynomial function. $f\(\left\)(x\(\right\))=x^2+4x+x+7x^3$

Match the given polynomial function to its graph based on end behavior. $f\(\left\)(x\(\right\))=-2x^3+x^2+1$

Find the zeros of the given polynomial function and give the multiplicity of each. State whether the graph crosses or touches the x-axis at each zero. $f\(\left\)(x\(\right\))=2x^4-12x^3+18x^2$