The "Dogs of the Dow" are the stocks listed on the Dow with the highest dividend yield. The following table shows the to 10 stocks of the "Dogs of the Dow" list for 2015, based on their performance the preceding year. Symbol Company Price ($) Yield T AT&T 33.59 5.48% VZ Verizon 46.78 4.70% CVX Chevron 112.18 3.82% MCD McDonald's 93.70 3.63% PFE Pfizer 31.15 3.60% General GE 25.27 3.48% Electric MRK Merck 56.79 3.17% CAT Caterpillar 91.53 3.06% XOM ExxonMobil 92.45 2.99% KO Coca-Cola 42.22 2.89% You decide to make a small portfolio consisting of a collection of 3 of the top 10 Dogs of the Dow. (a) How many portfolios are possible? portfolios (b) How many of these portfolios contain VZ and MCD but neither KO nor XOM? portfolios (c) How many of these portfolios contain at least two stocks with yields above 3.5%? portfolios