On 12 March 2021 Annabel bought a 180-day $100 000 bank bill for $97 500. She sold this bank bill on 20 May 2021 at 6.79% p.a. (simple interest).

a) What was the (simple interest) purchase yield Annabel paid (expressed as a percentage and rounded to three decimal places)?

a.

11.847% p.a.

b.

5.348% p.a.

c.

5.199% p.a.

d.

13.564% p.a.