On some shopping sites $($e$.$g$.,$

amazon.com$),$ a product can have multiple sellers. Usually, the seller list is displayed based on

the total cost $($product price plus shipping cost$).$ Natually, a seller is listed if it has inventory for the product.

For this assignment, assume you are managing three products: appleIPhone, earBuds, and keyboard. To separately

manage the seller list in ascending order of total cost for each product, use a singly linked list. Ties are broken by seller

names in alphabetically order. When the inventory is zero, the corresponding node is deleted. You can borrow$/$modify

SinglyLinkedList from the textbook or implement your own. We will evaluate your submissions on

code$01.$fit.edu so we

strongly recommend you to test your programs on

code$01.$fit.edu. To preserve invisible characters, we strongly recommend

you to download, NOT copy and paste, input data files.

Input: To simulate the shopping and inventory events, an input file contains events in the same directory as your program

file called HW$1.$java that has the main method. Initially, each product has no sellers $($no inventory$).$ Your submission takes

the input file name as a command$-$line argument. Each line is one of the following event:

AddSeller product seller price shippingCost quantity

RemoveSeller product seller

IncreaseInventory product seller quantity

CustomerPurchase product seller quantity

DisplaySellerList product

DisplaySellerList considers the cost of one item of the product.

Output: The program prints events to the standard output $($screen$).$ Each event is on one line and possible events are:

AddSeller product seller price shippingCost quantity $[$NonPositiveQuantityError$]$

RemoveSeller product seller $[$NonExistingSeller Error$]$

IncreaseInventory product seller quantity updatedInventory

CustomerPurchase product seller quantity updatedInventory or NotEnoughInventoryError

DepletedInventoryRemoveSeller product seller

DisplaySellerList product

Assume a seller's name is at most $10$ characters, use right justification for each column in the seller list. When inventory is

depleted, DepletedInventoryRemoveSeller is displayed and the corresponding node is removed.