Is (x-4) a factor of f(x) = x^3 - 2x^2 + 5x + 1? Use either the remainder thereom or the factor thereom to explain your reasoning. (pls give thourough explanation I don't understand this well)

Real gross domestic product: a) will increase if the price level increases. b) can change from one year to the next even if there is no change in output. c) will increase if the level of output increases. d) is a measure of inflation.