NAB earns $4\%$ on $$2$ billion of interest earning assets and pays $3\%$ on $$1\mathrm{.}5$ billion of interest liabilities. With total capital of $$3$ billion. Calculate NAB's Interest Rate Margir

Select one:

a$.$ None of the answers here

b$.$ Not enough information provided

c$.1\mathrm{.}17\%$

d$.1\mathrm{.}41\%$

e$.1\mathrm{.}71\%$