I need help with c and d

4. A four-year study of various brands of bottled water found that 25% of bottled water is just tap water packaged in a bottle. Consider a sample of seven bottled-water brands, and let x equal the number of these brands that use tap water. Complete parts a through d. a. Is x (approximately) a binomial random variable? Yes No b. Give the probability distribution for x as a formula. Choose the correct answer below. VA. O B. p (x) = (0.25) * (0.75 ) 7 - * P(x) = (x)025(7 - *) 0.75 O C. P(x) = (0.75) *(0.25) 7 -x OD. P(x) = * (0.25) 7 -* (0.75 ) c. Find P(x = 4). P(x = 4) = (Round to four decimal places as needed.) d. Find P(x$ 1). P (xS 1) = (Round to four decimal places as needed.)