Isaac D$$ez of Brazil. Isaac D$$ez Peris lives in Rio de Janeiro, Brazil. While attending school in Spain he meets Juan Carlos Cordero from Guatemala. Over the summer holiday Isaac decides to visit Juan Carlos in Guatemala City for a couple of weeks. Isaac's parents give him some spending money, $4,550$ Brazilian real $($BRL$).$ Isaac wants to exchange his Brazilian real for Guatemalan quetzals $($GTQ$).$ He collects the following rates:

Spot rate, Guatemalan quetzals per euro:

Spot rate, Euros per Brazilian real:

$GTQ11\mathrm{.}4283=$ EUR $1\mathrm{.}00$

EUR $0\mathrm{.}3969=BRL1\mathrm{.}00$

a$.$ What is the Brazilian reais$/$Guatemalan quetzal cross rate?

b$.$ How many Guatemalan quetzals will Isaac get for his Brazilian reais?