You are incorrect - our patient's acoustic events at the apex include a holosystolic murmur, a fourth heart sound and a third heart sound.
Your choice: Holosystolic murmur + S3 + mid diastolic murmur
This is a graphic example of a systolic plateau shaped murmur, a third heart sound and a mid diastolic murmur. Note that the sytolic murmur is high frequency and the third heart sound and diastolic murmur are low frequency.