1. [3 points each] Indicate whether each of the following statements is true or false. Ex- plain briefly. (a) According to the Solow growth model, a reduction in population growth can raise the growth rate of real GDP per capita. (b) In the simple Romer model, the economy may sometimes deviate from the bal- anced growth path. (c) If the number of employed people increases, the unemployment rate falls. (d) Efficiency wage can lead to involuntary unemployment.