Let f(t) be the weight (in grams) of a solid sitting in a beaker of water. Suppose that the solid dissolves in such a way that the rate of change (in grams/minute) of the weight of the solid at any time t can be determined from the weight using the forumula: f' (t) = - 4f(t) (2 + f(t)) If there is 6 grams of solid at time t = 2 estimate the amount of solid 1 second later. grams