Community exology: community ecologists study the factors that determine the abundance of different species. the abundanceof three algae species(in mg/ml) is quatifiued in two different lakes before and after an unusually hot summer. the coordinates of these four samples in r3 are (i) lake a: (97,84,43) and (100,80,50) before and after summer, respectively and (ii) lake b: (23,59,22) and (20,63,15) before and after summeer, respectively. (a) how does the maqnitude of change in algal community compare between the two lakes? (b)how does the direction of change in algal community compare between the two lakes?