Exercise 13.9

Given the full joint distribution shown in Figure dentist-joint-table, calculate the following:

1. $\textbf{P}({toothache})$.

2. $\textbf{P}({Catch})$.

3. $\textbf{P}({Cavity}{catch})$.

4. $\textbf{P}({Cavity}{toothache}\lor {catch})$.