Prob. #$1$: $3-99$

Figure $3-46$ shows the results of an x$-$ray diffraction experiment in the form of the intensity of the diffracted peak versus the $2$ diffraction angle. If $x-$rays with a wavelength of $0\mathrm{.}07107$ nm are used, determine $($a$)$ the crystal structure of the metal, $($b$)$ the indices of the planes that produce each of the peaks, and $($c$)$ the lattice parameter of the metal