str is a String object. Write Java statements that finds the number of the letters $(\text{'}$A$\text{'}-\text{'}$Z$\text{'}\text{'}$a$\text{'}-\text{'}$z$\text{'})$ in str$.$ Write only the Java statements that performs the above described task, nothing else.$(5$ pts$)$ Write Java statements that adds info $68$ to this ordered linked

list. $($No search operation!!!$)$

Node $x=$ new Node$(68,$ null$)$;

list.getLast $().$ setLink $($x$)$;

list.setLast $(x)$;