The 1h nmr spectra of carvone and the epoxidation product(s) are extremely complicated, so we've only given you partial spectra (from δ 3.0 - 7.0 ppm), showing the double bond regions. there are three peaks in this region in the carvone spectrum, corresponding to ha, hb and hc. based on chemical shift or coupling considerations, assign the peaks for ha and hb/c (you can't distinguish between hb and hc, so just label both peaks hb/c).