n n First, we need to answer some basic questions like how common is Friday the 13th? n Depending on the year, Friday the 13th can occur either once, twice, or three times. But how many times does it occur on average per year? n Using Rstats, we can make a simple function to count the numnber of Friday the 13ths using the weekday() function. We can either call this function once (e.g. how many Friday 13ths were there in 2023) or repeatedly (e.g. what’s the average number of Friday the 13ths per year