How do I achieve the final objective? "With the truck class change the constructor so that an int for the horsepower is passed into the truck constructor instead of the entire engine $($this is the only data needed to create an engine$)$ use this to create the engine within the vehicle $($truck can pass the int up into vehicle if you add a constructor for this in vehicle$).$ Since truck$/$Vehicle creates its own engine within the object it is safer code than creating it in main or who$-$knows$-$where."

I achieved the other objectives, but I have no idea how to start. This is the code:

import java.util.$*$;

$/**$

$*$ This is the program driver $($where the program starts$)$

$*$ It is in charge of creating the race and it's participants and telling them to $"$go$"$ in the race.

$*$ @author vjl$8401$

$*/$

public class RaceTrack$2//$driver

$\{$

public final static int raceDuration $=1000$; $//$store the length of the race $($can be accessed anywhere in code$)$

public static void main$($String arg$[])$

$\{$

$//$Instantiating my object instances

Engine engine $=$ new Engine$(67)$;

Vehicle c$1=$ new Car$(1,$engine,$2,5)$; $//$this one I$\text{'}$m storing as the base class $($vehicle$)$

Car c$2=$ new Car$(2,$new Engine$(94),4,5)$;

Truck t$1=$ new Truck$(3,$new Engine$(87),2,3,250)$;

Motorcycle m$1=$ new Motorcycle$(4,$ new Engine$(90),2,1,0\mathrm{.}05$f$)$;

$//0\mathrm{.}02-$ motorcycle won every single season. $0\mathrm{.}05-$ other vehicles have a chance

$//$This is an array

Vehicle$[]$ allVehicles $=$ new Vehicle$[4]$;

$//$placing the vehicles into an array

allVehicles$[0]=$ c$1$; $//$polymorphism $("$isa$")$

allVehicles$[1]=$ c$2$; $//$remember just because I store these as vehicles doesn't mean that the

allVehicles$[2]=$ t$1$; $//$methods for them has changed. Each still stores its own go method.

allVehicles$[3]=$ m$1$;

int wins$[]=$ new int$[4]$;$//$store the number of wins

for$($int stage$=0$; stage$<20$;stage$++)\{$

boolean raceInProgress$=$true;

System.out.println$("$STAGE $"+($stage$+1))$;

while $($raceInProgress$)$

$\{$

int max$=0$;

$//$tell the cars to $"$go$"$ one by one

for $($int i$=0$; i raceDuration$)$

$\{$

System.out.print$("$Winner of Stage $"+($stage$+1)+"$:

$***$ Vehicle $"+$RaceTrack$2.$GetFurthestVehicle$($allVehicles$)+"***$

$")$;

wins$[$RaceTrack$2.$GetFurthestVehicle$($allVehicles$)-1]++$;

System.out.println$()$;

for$($int a$=0$;a $<$ allVehicles.length;a$++)\{$

allVehicles$[$a$].$reset$()$;

$\}$

raceInProgress$=$false;

$\}$

$\}$System$.$out.println$()$;

$\}$

int pole$=0,$ wind$=0$;$//$check to see who had the most wins

for$($int i$=0$;i$<4$;i$++)\{$

System.out.println$("$Vehicle $"+$ allVehicles$[$i$].$VIN $+"$: $"+$ wins$[$i$]+"$ wins"$)$;

if$($wins$[$i$]>$wind$)\{$

wind $=$ wins$[$i$]$;

pole$=$i;

$\}$

$\}$

System.out.println$("$SEASON WINNER: VEHICLE $"+($pole$+1))$;

$\}$

$//$just a helper method to find out which vehicle won the race

public static int GetFurthestVehicle$($Vehicle$[]$ allVehicles$)$

$\{$

int max$=0$;

int VIN$=0$;

for $($int i$=0$; i maxOccupancy$)\{$

System.out.println$("$Over capacity; only the maximum number of passengers will be allowed on$.$

All others must leave the vehicle."$)$;

this.passengers$=$maxOccupancy;

$\}$else$\{$

this.passengers$=$passengers;$\}$

$\}$

public int getRaceProgress$()\{$

return RaceProgress;

$\}$

public void setRaceProgress$($int raceProgress$)\{$

this.RaceProgress $=$ raceProgress;

$\}$

$//$Constructors $($used to create the objects$)$:

Vehicle$($int vin, Engine horsePower, int maxPass$)$

$\{$

passengers $=1$;

RaceProgress $=0$;

VIN $=$ vin;

engine $=$ horsePower;

maxOccupancy $=$ maxPass;

$\}$

$/**$

$*$ This is the main function that progresses the vehicles through the race

$*$ this should be called each loop of the program $($this must be redefined in each

$*$ subclass of vehicle$)$

$*/$

abstract public void Go$()$; $//$this is correctly coded, the abstract method only has its header, and no body $-$ the body must be overwritten in subclasses

$/**$

$*$ Part of object. This is invoked when an instance of this class is attempted to be used as a string $($like during System.out.println$)$

$*/$