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, 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(); p=; r = 9; 4 = null; The execution of the above code is illustrated by the following object diagram: Person p Garbage collected * Person q null Person Garbage collected r r is an alias of p a) Person p = new Person(); Person q = new Person(); Person r = new Person(); p = 9; 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(); r= p; p = null; c) Person p = new Person(); Person q = new Person(); Person r = new Person(); p=; q = null; r=g; q=p