4.The following table presents the data for an economy when the government's budget is balanced.

Real interest rate

(percent per year)

Loanable funds demanded

(billions of 2007 dollars)

Loanable funds supplied

(billions of 2007 dollars)

2

3

4

5

6

7

8

9

10

9.0

8.0

7.0

6.0

5.0

4.0

3.0

2.0

1.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

11.0

Calculate the equilibrium real interest rate, investment, and private saving. Why is this interest rate referred to as equilibrium?