9% of microchips from MicroLand are defective. A sample of 3 chips is checked for functionality. a) Draw the probability distribution for the number of defective chips in the sample. b) If we check 70 chips, what number of defective chips should we expect? What is the standard deviation for 70 chips? AN explanation of part a) would be very much appreciated. Thank you. Solution a) 0.0072 B)0.51 2.03.