3. One environmental group did a study of recycling habits in a California community. It found that 70% of the aluminum cans sold in the area were recycled. Suppose a sample of size 400 is randomly selected. a. Verify that the normal distribution can be used to approximate the sampling distribution of p and describe the parameters of the sampling distribution of the sample proportion. Let n = 400. b. If 400 cans are sold today, what is the probability (using the normal approximation) that 300 or more will be recycled? c. Of the 400 can sold, what is the probability (using the normal approximation) that between 260 and 300 will be recycled