 Hello and welcome to the session. My name is Mansi and I am going to help you with the following question. The question here says if A equals to the set 3,6,9,12,15,18,21, B equals to the set 4,8,12,16,20, C equals to the set 2,4,6,8,10,12,14,16 and D equals to the set 5,10,15,20 then find the ninth part that is C minus B. Let us see the solution to this one. We see that C minus B is the set 2,6,10,14 and this is our answer to this question. I hope you understood the question and enjoyed the session. Have a good day.