Convert the following textual description to an entity$-$relationship diagram in UML notation ON PAPER! Please spend time differentiating between entities, attributes, relationships and values of attributes. If you are identifying a strong entity $-$ make sure you identify a primary key for it$.$ Remember, weak entities do not have a primary key. You are not required to use superclass$/$subclass hierarchy for any of these problems, but may choose to do so if you wish. "Our world is composed of $7$ continents. A continent has a unique name and a current population. Each continent is composed of $0$ to many countries. A country has a unique name, and a current population. A country may be situated on $1$ to many continents. There are also languages that are spoken in these countries. A country has $1$ to many official languages. A language may be an official language for $0$ to many countries."