I have a data frame in R called fomc with a column text that holds the full text of every FOMC statement since 2006, one statement per row. Each statement says what the Fed decided about its policy rate, for example:

"the Committee decided to raise the target range for the federal funds rate to 4-3/4 to 5 percent."

Write R code with stringr that extracts the target range from each statement into two numeric columns, lower and upper (here 4.75 and 5).
