analysis on a piece of unknown fractured metallic material. You have submitted the said metallic material to the $x-$ray Diffraction $($XRD$)$ laboratory and the obtained $xRD$ spectrum is shown in Figure Q$1($i$).$ The wavelength of the incoming X$-$ray used was $0\mathrm{.}154nm.$

Rajah S$1($i$)/$Figure Q$1($i$)$

$($a$)$ Berdasarkan spektrum XRD yang diperolehi, logam tersebut mungkin mempunyai struktur hablur BCC atau FCC$.$ Tentukan struktur hablur logam tersebut.

Based on the obtained XRD spectrum, the metal could be either having BCC or FCC crystal structure. Determine the crystal structure of the metal.

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$($b$)$ Tentukan pemalar kekisi bahan logam tersebut.

Determine the lattice constant of the metal.

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