For the polynomial r(x)=kx2+(k−3)x+1, answer the following:
a. (i) Determine the value(s) of k for which x=1 is a zero of r(x).
b. (ii) For each value of k obtained in part (i), find the other zero of r(x).
c. (iii) Verify your answer to part (ii) by direct substitution.