2) For each snippet of code below, draw an object diagram showing the memory organization once the snippet of code has been executed. The variables p, q and r are all of type Person (as defined in question 1)). Indicate on the object diagram any alias and any object that has been garbage- collected (see the given example). Example: Person p new Person): Person q-new Person); Person r= new Person(); q = null; The execution of the above code is illustrated by the following object diagram: Garbage collected Person null Person Garbage collected is an alias of p r is an alias of p a) Person p new Person(); Person q new Person); Person r new Person(); P q; q- r; r p; b) Person p new Person(); Person q p; p- new Person(); Person r p; p new Person); q p; p new Person(); p null; c) Person p new Person(); Person qnew Person(); Person r new Person(); p q qnull; q p