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 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 Plizer 31.15 3.60% GE General Electric 25.27 3.48% MRK Merck 56.79 3.17% Source: www.dogsofthedaw.com. % CAT Caterpillar 91.53 3.0696 XOM ExxonMobil 92.45 2.99% 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? 120 portfolios (b) How many of these portfolios contain vz and MCD but neither ko nor XOM? 20 X portfolios (c) How many of these portfolios contain at least two stocks with yields above 3.5%? portfolios