Add a method void replaceFirst$($int oldVal, int newVal$)$ to the IntegerList classthat replaces the first occurrence of oldVal in the list with newVal. If oldVal does not appear in list,it should do nothing $($but it's not an error$).$ If oldVal appears multiple times, only the first occurrenceshould be replaced.

The search method works like this: public int search$($int target$)\{$

int location $=-1$;

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