The quantity of a radioactive substance at time / is @ (1) = 5(0.92) grams. (a) Find Q (10) and @ (20) Round your answers to one decimal place. e(10) = 1 @ (20) = (b) Find the average of @ ( 10) and @ 20) Round your answer to two decimal places Average = (c) Find the average value of O (1) over the interval 10 = / $ 20, Round your answer to two decimal places Average value