Based on a Comcast survey, there is an 80% probability that a randomly selected adult will watch ...

Based on a Comcast survey, there is an 80% probability that a randomly selected adult will watch prime time TV live, instead of online, on DVR, etc.  Assume that seven adults are randomly selected with replacement. Round all probabilities to 3 significant figures.
 
a.   State the four conditions for a binomial probability distribution and how each condition is satisfied specifically for this problem.
 
 
 
 b.   Determine the probability that exactly four of the randomly selected adults watch prime time TV live. State your values for n, p, q, and x.  
 
 
 
 
c.   Determine the probability that less than four of the randomly selected adults watch prime time TV live. State your values for n, p, q, and x.
 
 
 d.   Determine the probability that all of the selected adults watch prime time TV live. State your values for n, p, q, and x.