$1.$ Take the following two exchange rates and compute the EUR$/$SAR cross exchange rate. SAR$3\mathrm{.}650/$USD and USD$1\mathrm{.}1285/$EUR$.($answer to $4$ decimal places and avoid rounding until reporting a final answer$)$ In question $1,$ if there is a direct cross exchange rate of EUR$\mathrm{.}2515/$SAR$,$ is there a triangular arbitrage opportunity? If yes, start with $$50,000$ and indicate how much triangular arbitrage profit exists for $1$ trip around the triangle.