Q22. For the polynomial f(x) = 4(x - 5)(x - 6)³, list each real zero and its multiplicity. Determine whether the graph crosses or touches the x-axis at each x-intercept.

a. 5, multiplicity 1, touches x-axis; 6, multiplicity 3

b. -5, multiplicity 1, touches x-axis; -6, multiplicity 3

c. 5, multiplicity 1, crosses x-axis; 6, multiplicity 3, crosses x-axis

d. -5, multiplicity 1, crosses x-axis; -6, multiplicity 3, crosses x-axis