Find the common factors of the pair of numbers. Begin with the smallest. <br> 12 and 18: <input min="0" type="number" id ="imp4pg006q7b_1" class="lineinput" placeholder="?" /> <input min="0" type="number" id ="imp4pg006q7b_2" class="lineinput" placeholder="?" /> <input min="0" type="number" id ="imp4pg006q7b_3" class="lineinput" placeholder="?" /> <input min="0" type="number" id ="imp4pg006q7b_4" class="lineinput" placeholder="?" />