Learning Goals: $$ Familiarization with stack and queue concepts $$ Reinforce the concept of adapting the stack and queue abstract data type to an underlying implementation data structure $$ Familiarization and practice using the STL$$s adapter container interface $$ Increase recursion proficiency $$ Reinforce modern C$++$ object$-$oriented programming techniques Description: Continuing with our grocery item and grocery list themes, you are now at a grocery store shopping for the grocery items on your list. As you walk up and down the aisles you place grocery items into your shopping cart, one grocery item on top of the other. The last grocery item you place into your shopping cart will be on top and will be the first grocery item you remove. In fact, if you want to get to something at the bottom of your cart you$$ll have to remove everything on top of it first. You$$re a very smart shopper so you know to start with canned goods first so they won$$t break, and finish with the eggs last. As luck would have it$,$ you$$ve almost completed your shopping and have a pretty full cart when the wheel falls off rendering your cart unmovable. Determined to complete your grocery shopping you grab another cart and begin moving items from the broken cart to the new cart when you realize that your breakable grocery items, like eggs, will now be on the bottom. But that$$s an easy problem to solve, all you have to do is get a third cart and carefully move grocery items between the two new carts so that the breakable items are always on the top.