$[9]$ Compute the gyro radius $"$ Larmor radius" and cyclotron frequency $({}_c)$ for the following plasma configuration: A $2\mathrm{.}5MeVH{e}^{++}$particle in a $7-$Tesla fusion reactor. Note that the pitch angle $=90$ and $H{e}^{++}=6\mathrm{.}6{10}^{-27}kg.$

$[10]$ Calculate the plasma angular frequency in the neutron star environment of temperature $T_e=100$keV and electron density is ${10}^{12}c{m}^{-3}?$