Formal Opinion of the Teacher: I find, beyond reasonable doubt, that the student has demonstrated exemplary mastery of TeachRock's Music & Ratios unit. The evidence establishes accurate use of proportional reasoning, correct octave reduction and frequency calculation, and faithful reconstruction of the Pythagorean C scale. Musical judgment is substantiated: simple whole-number ratios were identified as consonant; complex ratios as producing perceptible beating. The student communicated methods, showed stepwise calculations, and applied rounding rules responsibly. These findings meet ACARA v9 expectations for numeracy, the arts (music), and general capabilities. Remedy: continue integrated practice in tuning, composition, and ratio problems. Conclusion: performance is exemplary. The scholar is commended. End of opinion. May this rigorous curiosity guide future compositions, analyses, and joyful listening always and in equal measure.