draw uml diagram of the code below

$$

public class Main $\{$

public static void main$($String$[]$ args$)\{$

BourseRateTracker rateTracker $=$ new BourseRateTracker$()$;

CurrencyDisplay display$1=$ new CurrencyDisplay$()$;

CurrencyDisplay display$2=$ new CurrencyDisplay$()$;

rateTracker.registerObserver$($display$1)$;

rateTracker.registerObserver$($display$2)$;

rateTracker.setUsdTryRate$(8\mathrm{.}0)$;

$\}$

$\}$

$$

import java.util.List;

import java.util.ArrayList;

public class BourseRateTracker implements CurrencyRateTracker $\{$

private List observers $=$ new ArrayList$<>()$;

private double usdTryRate;

public void setUsdTryRate$($double rate$)\{$

this.usdTryRate $=$ rate;

notifyObservers$()$;

$\}$

@Override

public void registerObserver$($Observer o$)\{$

observers.add$($o$)$;

$\}$

@Override

public void removeObserver$($Observer o$)\{$

observers.remove$($o$)$;

$\}$

@Override

public void notifyObservers$()\{$

for $($Observer observer : observers$)\{$

observer.update$($usdTryRate$)$;

$\}$

$\}$

$\}$

$$

public interface CurrencyRateTracker $\{$

void registerObserver$($Observer o$)$;

void removeObserver$($Observer o$)$;

void notifyObservers$()$;

$\}$

$$

public class CurrencyDisplay implements Observer $\{$

@Override

public void update$($double rate$)\{$

System.out.println$("$Updated USD$/$TRY Rate: $"+$ rate$)$;

$\}$

$\}$

$$

public interface Observer $\{$

void update$($double usdTryRate$)$;

$\}$