The certainty will be close to zero. Note that the certainty from
the combined actions is much smaller than the minimum of the effects
of single actions.
Exercise 1.2:
The structure should be similar to the structure of the "Car Start" model.
Exercise 1.3:
All variables are d-connected to A given evidence on B.
All variables (except C and F) are d-connected to A given
evidence on J.