Use Superposition theory to find Node Voltages. Vs$1=10$v$,$ Vs$2=15$v

R$1=5\mathrm{.}5$k

R$2=3\mathrm{.}5$k

R$3=1$k

R$4=7\mathrm{.}5$k

R$5=4\mathrm{.}5$k

R$6=2\mathrm{.}2$k