Assumethatfivereferencenodesare

knownatNode$1$:$(0,3,0),$Node$2$:$(6,0,0),$Node$3$:$(3,4,0),$Node$4$:$(4,3,0),$andNode$5$:$(0,0,8)$

respectively.Also,fornode U$,$ weknowthefollowingpropagationtimes:

U$11=0$s$,$U$12=1$s$,$U$13=0\mathrm{.}7$s$,$U$14=0\mathrm{.}7$s$,$& U$15=1\mathrm{.}7$s$.$ The velocityofpropagationis v$.$

$($i$)$ Findtheunknownlocation$($xU$,$ yU$,$ zU$).$