Consider the following five random variables:

• A standard normal random variable; no parameters needed.
• A student's t distribution with 10 degrees of freedom; df = 10.
• A Bernoulli variable that characterizes the probability of default (PD), where PD = 4%; p = 0.040
• A Poisson distribution that characterizes the frequency of operational losses during the day, where lambda = 5.0
• A binomial variable that characterizes the number of defaults in a basket credit default swap (CDS) of 50 bonds, each with PD = 2%; n = 50, p = 2%

Which of the above has, respectively, the lowest value and highest value as its variance among the set?