MM 18 6 Ma A greenhouse in a tri-county area has kept track of its customers for the last several years and has determined that 28% of its customers plant a vegetable garden in the spring. The greenhouse obtains a random sample of 1000 of its customers. Round to four decimal places. a) Describe the sampling distribution p, the sample proportion of its customers who plant a vegetable garden in the spring. Show work. [3 points] b) What is the probability that less than 300 customers plant a vegetable garden in the spring? Show work. [3 points]