The weight (in lbs) of a particular breed of dog follows a normal distribution with mean = 20 and standard deviation = 4. Suppose 8 dogs of this breed are randomly selected. Let Y₁ be the number of dogs weighing less than 16 lbs, Y₂ the number of dogs weighing at least 16 lbs but less than 24 lbs, Y₃ the number of dogs weighing at least 24 lbs but less than 28 lbs, and Y₄ the number of dogs weighing at least 28 lbs. Find p(3, 2, 1, 2). Ans. 0.000219946