Implement the lcs$\_$length$()$ function. You should not return the double$-$array b and c as in thepseudocode. Instead, return the length of the longest commonsubsequence. Hint: To get the i$-$th character in a string s$,$ use s$.$charAt$($i$)$ For example, the code:

String s $=$ XYZ ;

System.out.println$($s$.$charAt$(1))$;

prints out Y