A currency trader is quoting GBP$/$US$ mid$-$point $$1\mathrm{.}6496,$ bid$-$offer spread $489-503.$ What are the actual bid$-$offer rates?

Question $4$Select one:

a$.$

$1\mathrm{.}60071\mathrm{.}6999$

b$.$

$1\mathrm{.}64821\mathrm{.}6510$

c$.$

$1\mathrm{.}64891\mathrm{.}6503$

d$.$

$1\mathrm{.}64961\mathrm{.}6503$