Create a new dataframe named `brf_Q5a` that is the same as `brf_Q2` except that you'll add a new variable to it named `FRTDAY` that converts all of the responses into fruits eaten *per day*. Be sure to account for 0 days. Use 30 days per month, 7 days per week, and 0.02 for less than once a month in your conversion calculations in R