Assess undergraduate students' ability to determine structures of small organic molecules by integrating 1H NMR (chemical shifts, integration, multiplicity, coupling constants), IR (functional-group identification), and mass spectrometry (molecular ion, isotope patterns, fragmentation) data; tasks include deducing molecular formulas, assigning proton signals, identifying functional groups, distinguishing isomers, and providing concise structural justifications for medium-complexity compounds (≈≤12 carbons).