$($c$)$ The class Book, listed below, is thread safe but may deadlock. Explain why and re$-$write it

so that deadlocks cannot occur.

class Book$\{$

private String title;

private Lock lock $=$ new ReentrantLock$()$;

Book$($String t$)\{$title $=$ t;$\}$

String title$()\{$

lock.lock$()$;try$\{$ return title;$\}$finally$\{$lock$.$unlock$()$;$\}$

$\}$

void set$($String nt$)\{$

lock.lock$()$;

try$\{$title $=$ nt;$\}$finally$\{$lock$.$unlock$()$;$\}$

$\}$

public boolean equals$($Object p$)\{$

lock.lock$()$;

try$\{$

Book b $=($Book$)$p;

b$.$lock.lock$()$;

try$\{$ return$($title$.$equals$($b$.$title$))$;$\}$

finally$\{$b$.$lock.unlock$()$;$\}$

$\}$finally$\{$lock$.$unlock$()$;$\}$

$\}\}$