Define $5$ constants for the initial populations of the fish in each pond with the following names: INIT$\_$POP$\_$POND$\_1,$ INIT$\_$POP$\_$POND$\_2,$ INIT$\_$POP$\_$POND$\_3,$ INIT$\_$POP$\_$POND$\_4,$ and INIT$\_$POP$\_$POND$\_5.$ Assign them with the following values: $10,25,12,30,$ and $4.$

Define $5$ constants for the population yearly growth rate with the following names: