I am confused about this. Please help.

Sandra Guerra Thompson, a Professor of Law and Criminal Justice and Institute Director at the University of Houston Law Center, wrote Beyond a Reasonable Doubt? Reconsidering Uncorroborated Eyewitness Identification Testimony, in 2008 in the U. C. Davis Law Review. This article reviews the overwhelming scientific evidence that establishes that eyewitnesses are notoriously inaccurate in identifying strangers, especially under the conditions that exist in many serious offenses such as robbery. Many of the factors that tend to decrease the accuracy of an identification are intrinsic to a witness' abilities, and not the product of inappropriate suggestion by the police. We know, for example, that eyewitnesses identify a known wrong person (a "filler" or "foil") in approximately 20% of all real criminal lineups. Using the data that 20% of eyewitnesses identify a known wrong person, please create a probability distribution by creating a table. Let X represent a discrete random variable that counts the number of incorrect identifications. There are four values of the random variable X. They are 0, 1, 2, and 3.