**Go backward to **Solution to part (a)

**Go up to **4 Variable Elimination Algorithm (Multiply Connected)

**Go forward to **Solution to part (c)

## Solution to part (b)

Suppose we observe a value for *K*, what factors are removed and
what is created.
We remove a factor *P(K|I)* and replace it with a factor *f*_{1}(I).

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