073. Solving a chemistry problem

2. The sensitivity of the chromatograph detector to o-xylene, m-xylene and n-xylene is almost the same. Determine the mass fraction (in percent) of each of them in the mixture. The shape of the peaks is close to the normal distribution curve.
Mix 1
Mixture number o-xylene m-xylene p-xylene
h, mm m0.5, mm h, mm m0.5, mm h, mm m0.5, mm
2 72 11 80 13 35 19