In a study prepared in 2000, the percentage of households using online banking was projected to be f(t) = 1.6e0.78t (0 t 4) where t is measured in years, with t = 0 corresponding to the beginning of 2000. (Round your answers to three decimal places.) (a) What was the projected percentage of households using online banking at the beginning of 2002? % (b) How fast was the projected percentage of households using online banking changing at the beginning of 2002? %/yr (c) How fast was the rate of the projected percentage of households using online banking changing at the beginning of 2002? Hint: We want f "(2). Why? %/yr/yr