[
  "First find how long Section B took: Section A time + 3/4 h. Convert 3/4 to twelfths (9/12) to add easily.",
  "Section B = 5/12 + 9/12 = 14/12 h. Total time = Section A + Section B = 5/12 + 14/12.",
  "Add: 19/12 h. Convert the improper fraction to a mixed number: 19/12 = 1 7/12."
]