Assignment 1

• The tanks are pictured as running `downhill' but the Tank.add method works as if they were running `uphill'. Change the Tank.add method to make sense here. (Add or change any other methods if necessary or desired.)
• Write a Tank.remove method that removes an indicated amount of water, again working in a way that makes sense given that tanks are arranged downhill.
• Add code in the TankApplet to allow users to invoke the Tank.remove method.
• Add a method and other support code in the TankApplet to allow users to deleteLast -- delete the last tank in the chain.
• Feel free to improve or change any of the methods controlling graphical appearance. (Affects only up to 10% of score.)