NAB earns 4% on $2 billion of interest earning assets and pays 3% on $1.5 billion of interest liabilities (that also comprise total liabilities). With total equity of $1.5 billion. Calculate NAB's Interest Rate Margin.

Not enough information provided

b.

0.98%

c.

0.68%

d.

1.17%

e.

None of the answers here.