Node1=Normal(2,0.5) Node3=Normal(2,1) Node1 Node3 Node2=Node1+Node3+Normal(0,1) Node1 Node3 Node4=Node1+Node3+Normal(-1,0.2) Node1 264 175 312 205 Node2 428 184 476 214 Node3 266 262 314 292 Node4 414 272 462 302