The population of elephants in a nature reserve is given by dE 2 2E2 + E, dr where E is the number of elephants (in thousands) and t is the number of years since January 'I, 2019. Suppose that on January 1, 2019, the number of elephants is 1200. Using Euler's method and At = 0.25, approximate the number of elephants in the nature reserve on January 1, 2021