Consider a network of 5 nodes located at following coordinate points: sink(0,0), B(0,2), C(2,0), D(2,2) and E(4,0). Assume the transmission power necessary to reach a node at distance d is a+b*d2 (a and b are constants). What is the least common transmission power necessary to form a connected network topology: 1) star topology centered at the sink, and 2) multi-hop topology?