Suppose a population has been experiencing fixed f(x) and {(x) for a long time, and is growing at a rate r. Let k(x, t) = population age x in year t. A. Write an equation or formula that relates k(30, 2018) to k(30, 2000). B. Write an equation or formula that relates k(0, 2000) to k(10, 2010). 0. Write an equation or formula that relates k(0, 2018) to k(20, 2018)