Hattie had $10,400 to invest and wants to earn 4.9% interest per year. She will put some of the money into an account that earns 2.4% per year and the rest into an account that earns 5% per year. How much money should she put into each account?
a) $6,000 at 2.4%, $4,400 at 5%
b) $4,000 at 2.4%, $6,400 at 5%
c) $5,200 at 2.4%, $5,200 at 5%
d) $7,800 at 2.4%, $2,600 at 5%