15. In the country of Wakanda, GDP has the following production function Y = AK$^\alpha$L$^{1-\alpha}$, where the
labor share of GDP is 30%, the stock of capital is 100, there is one worker per 10 units of capital, and
Total Factor Productivity (TFP) stands at 2. Due to some new discoveries in the use of \"vibranium\" (a
very important resource for Wakanda), TFP will double next year. Based on the previous information,
select the correct statement:
(a) Next year, GDP will be 200.47.
(b) Nowadays, the real wage is 4.
(c) Nowadays, the real rental rate is 2.
(d) Next year, the real wage will be 8.