A new company has developed a breakthrough Massive Multiplayer Online Role Playing Game $($MMORPG$).$ An MMORPG is a computer game that is played over the Internet, connecting to a server where other players from around the world are also playing the same game. It is possible to 'see' and communicate with these other players when online. This company has recruited you to be their database designer. The database will manage the accounts of all players registered for this online game. Each account must have a unique name. This will be the name that players use to log on to the game server: Players need to pay a fee every month for having an account and, when their time runs out, the account must be blocked. It must only be unblocked when they have purchased more time. Each account has a number of characters that have been created by the user. All characters have names and belong to a team. There must also be a skill level. A table in the database logs any errors that occur. Make sure that certain errors have a certain type so that these are easier to find. When playing the game with one of characters within the account, a player may find and pick up items. These items are then stored in the character's inventory. No item is unique, unfortunately, so other characters may have the same item. The inventory has eight open slots for different types of items to go into. Items that are the same can stack on the same slot; therefore, a record must be kept of the quantity.