Case $1$: when $10mdd$ break, the $3$D UMi LOS pathloss model is given by:

$P{L}_{3D\text{U}\text{M}\text{i}\text{L}\text{O}\text{S}}^{4G(a)}=22\mathrm{.}0log(d)+28\mathrm{.}0+20log(f)$

Case $2$: when $dbrea{k}^{b}d5000m$

$P{L}_{3D\text{U}\text{M}\text{i}\text{L}\text{O}\text{S}}^{4G(b)}=40\mathrm{.}0log(d)+28\mathrm{.}0+20log(f)$

$-9log[(d_{\text{b}\text{r}\text{e}\text{a}\text{k}}{)}^2+(h_t-h_r{)}^2]$

Problem $1$:

Using the $3$D UMi LOS pathloss Model $($b$)$ find the pathloss of the channel in decibels, for the following link parameters: $f=3GHz,h_t=10m$;$h_r=2m,d=380m.$