$4-3.$ The ratio of the number of atoms of the isotopes ${?}^{69}Ga$ and ${?}^{71}Ga$ in eight samples from different sources was measured in an effort to understand differences in reported values of the atomic mass of gallium:

$\backslash$table$[[$Sample$,{?}^{69}Ga{l}^{71}Ga,$Sample,${?}^{69}G\frac{a}{{?}^{71}}Ga$