1.3. Describe how, if at all, each of the following developments affects the breakeven and actual investment lines in our basic diagram for the Solow model:

(a) The rate of depreciation falls.

(b) The rate of technological progress rises.

(c) The production function is Cobb–Douglas, f (k) = kα, and capital’s share,

α, rises.

(d) Workers exert more effort, so that output per unit of effective labor for a given value of capital per unit of effective labor is higher than before.