The "Dogs of the Dow" are the stocks listed on the Dow with the highest dividend yield. The following table shows the top 10 stocks of the "Dogs of the Dow" list for 2021, based on their performance the preceding year. You decide to make a small portfolio consisting of a collection of 6 of the top 10 Dogs of the Dow. (a) How many portfolios are possible? portfolios (b) How many of these portfolios contain DOW but not MMM? portfolios (c) How many of these portfolios contain at most one stock priced above $100 ? portfolios