You are incorrect - our patient's acoustic events at the apex include a plateau-shaped holosystolic murmur + S3 + mid diastolic murmur.
Your choice: Late peaking systolic murmur + diastolic decrescendo murmur
This is a graphic example of a systolic late-peaking murmur and a diastolic decrescendo murmur. Note that the systolic murmur is mid frequency and the diastolic murmur is high frequency.