Question $1[10]$ setting up

Study the class definitions below:

class Node

$\{$

$//$ attributes

String flight$\_$no; $//$ flight number

Date arrival$\_$time; $//$ time at which flight lands

class PriorityQueue

$\{$

$//$ attributes

int currentSize;

Node root;

FlightNode$[]$ array $=$ new Node $[25]$;

$//$ methods

void clear$()$;

Boolean isEmpty$()$;

Boolean add$($Node x$)$;

Node remove$()$;

void percolateDown$($int hole$)$;

$\}$

$1\mathrm{.}1$ Create two files Node.java and PriorityQueue.java

$1\mathrm{.}2$ Copy the above definitions into the corresponding files

$1\mathrm{.}3$ Write code for a default and a loaded constructor for Node

$1\mathrm{.}4$ Write code for a default and a loaded constructor for PriorityQueue

$1\mathrm{.}5$ Write accessor and mutator methods for the attributes of Node

$1\mathrm{.}6$ Write accessor and mutator methods for the attributes of PriorityQueue