The following graph shows the supply of and demand for capital in a market over the last year. You can see that the demand for capital has increased over the last year (the demand curve shifted to the right). Place the black x at the equilibrium interest rate and the quantity of capital. The market interest rate increased by 2.0%, and the amount of capital borrowed _____ by _____ billion. Does it appear that the economy has strengthened or weakened over the past year? strengthened Weakened