/tr>
  <tr>
   <td style="text-align:left;"> reading-data-from-a-file-5 </td>
   <td style="text-align:left;"> exercise </td>
   <td style="text-align:left;"> read_csv(file = "data/students.csv", na=c("N/A", "")) </td>
  </tr>
  <tr>
   <td style="text-align:left;"> reading-data-from-a-file-6 </td>
   <td style="text-align:left;"> exercise </td>
   <td style="text-align:left;"> students |&gt; rename(student_id = "Student ID") </td>
  </tr>
  <tr>
   <td style="text-align:left;"> reading-data-fro