If you are considering investing in a firm, which profitability metric(s) would you focus on? Why? Based on this, which 3 firms would you invest in?

\begin{tabular}{|l|l|l|} \hline 2 & Company Name & Symbol \\ \hline 3 & 3 MCo & MMM \\ \hline 4 & Apple Inc & AAPL \\ \hline 5 & Boeing Co & BA \\ \hline 6 & Caterpillar Inc & CAT \\ \hline 7 & Chevron & CVX \\ \hline 8 & Cisco & CSCO \\ \hline 9 & Coca-Cola & KO \\ \hline 10 & Disney & DIS \\ \hline 11 & Home Depot & HD \\ \hline 12 & IBM & IBM \\ \hline 13 & Intel & INTC \\ \hline 14 & Johnson \& Johnson & JNJ \\ \hline 15 & McDonalds & MCD \\ \hline 16 & Merck & MRK \\ \hline 17 & Microsoft & MSFT \\ \hline 18 & Nike & NKE \\ \hline 19 & Pfizer & PFE \\ \hline 20 & Procter \& Gamble & PG \\ \hline 21 & United Technologies & UTX \\ \hline 22 & United Health & UNH \\ \hline 23 & Verizon & VZ \\ \hline 24 & Walmart & WMT \\ \hline \end{tabular} Profitability