Which of the following statements concerning the binomial distribution are true?

1. The binomial distribution is symmetrical in shape when p=0.5
2. For a given sample size, the variance of the binomial distribution is smallest when the probability of success is exactly 1/2.
3. For a fixed probability of success, the binomial distribution becomes less symmetric on increasing the sample size.
4. The probability of success is determined by the probability of failure and vice versa.
5. The binomial distribution is completely specified by its parameters, n and p.
6. The range of values that can be taken on by a binomial random variable is any integer value between 0 and n inclusive.
7. The binomial distribution provides a listing of all possible collectively exhaustive, though not necessarily mutually exclusive, outcomes for the random variable it is modelling, such that a certain probability of occurrence is associated with each outcome.