Answer to **Puzzle 182**: There are infinitely many paths from \$$E\$$ to \$$a\$$, with costs of the form 9+0.4+n*(2+0.4) for \$$n\in\mathbb{N}\$$, \$$\Phi(E,a)\$$ should be the infimum of of the possible costs, so \$$\Phi(E,a)=9.4\$$.

Similarly,

Answer to **Puzzle 183**: \$$\Phi(W,c)=5.7\$$

Answer to **Puzzle 184**: \$$\Phi(E,c)=9.4\$$.