Assume a1, ..., an, b1, ..., bn, c are all constants and n is a positive integer. Which of the following are not properties of summation? Note if you choose a wrong answer, then you will receive a small penalty. For example, if you choose all of the options, then you will receive 0 for this question. You cannot get less than 0 for this question. Select one or more: n n O a. ai Zi=1 ai provided Ebi # 0. bi i=1 i=1 Ob. n [c. a; = c ) a; where c is a constant. i=1 i= 1 U C. n n V aibi = ai bi i= 1 i= 1 n O d. n [ (a; + b;) = Zai + Ebi 1=1 i= 1 i=1