It's all for free. So problem number four, and it's, at least in my mind, pretty good practice. For a standard normal distribution, place the following in order from smallest to largest. So let's see, percentage of data below 1, negative 1. OK, let's draw our standard normal distribution. So a standard normal distribution is one where the mean is, sorry, that's due to the standard deviation, is one where the mean, mu for mean, is where the mean is equal to 0 and the standard deviation is equal to 1. So let me draw that standard normal distribution.