A baseball is hit so that its height in feet after t seconds is s(t) = - 21 + 20t + 3. (a) How high is the baseball after 1 second? (b) Find the maximum height of the baseball. (a) The height of the baseball after 1 second is (Type an integer or a decimal.) ft. (b) The maximum height of the baseball is (Type an integer or a decimal.) ft.