Potassium has a body centered cubic $($BCC$)$ crystal. The Atomic weight $=39\mathrm{.}1$and the atomic radius of Potassium is $2\mathrm{.}31$

A$.(20/100).$a$)$ Calculate the theoretical density of Potassium

$.$c$)$ Calculate linear atom density on the directions of $(110)$ ve $(311)(4/100)$

c$)$ Calculate linear atom density on the directions of $(110]$ ve $[111)(4/100).$

d$)$ Calculate $($i$)$ planar atom density and $($il$)$ planar packing factor on the planes of $(110)$ ve $(111)(6/200).$