Need help understanding problem $1$ on how to find R$1,$ R$2,$ R$3,$ R$4,$ R$5,$ also on how to find Vd$1,$ Vd$2,$ Vg$2,$ Vs$1,$ Vs$2$ and how to identify which region Q$1$ and Q$2$ are operating in using the given schematic. Design a circuit as shown below.

Find the $R_1,R_2,R_3,R_4,R_5.$

Given: V$1=12V,V2=10V,V3=15V,V4=-5V,V_{G1}=8V,I_{D1}=1mA,I_{D2}=3\mathrm{.}5mA,R_6=500,V_{tn}=2\mathrm{.}831V,$ and $Kn=2966\mathrm{.}3m\frac{A}{V^2}.$ Q$1$ and Q$2$ are identical.

$(20$ points$)$ Show the calculation in detail. $($Note: Neglect the channel$-$length modulation effect$).$ Show $V_{D1},V_{D2},V_{G2},V_{S1},V_{S2}.$ Identify which region Q $1$ and Q $2$ are operating in$.$

$(20$ points$)$ Demonstration: Build a circuit on PSpice and complete the simulation.

$($Note: Each branch may have slightly different voltages and currents.$)$

$($Tip: Use IRF $150.$ Model file is included$)$