Doug Bernard specializes in cross$-$rate arbitrage. He notices the following quotes:

Swiss franc$/$dollar $=$ SFr$1\mathrm{.}5979/$$

Australian dollar$/$U$.$S$.$ dollar $=$ A $$\frac{1\mathrm{.}8224}{\text{\$}}$

Australian dollar$/$Swiss franc $=$ A $$\frac{1\mathrm{.}1446}{S}Fr$

Required:

lgnoring transaction costs,

a$.$ Does Doug Bernard have an arbitrage opportunity based on these quotes?

Does Doug Bernard have an arbitrage opportunity based on these quotes?