please send fast. in Java

Write a Java program to perform following operation using String function st1=" HELLO" st2 ="hai" 1. Convert st2 into HAI and display its byte code 2. Check st1 and st2 are equal or not. 3.Extract 'ELL' from st1 and store into st3 4. Generate st3 ="HELLOai" from st1 and st2 5. Delete Vowels from st1 6. Compare st1 and st2 in lexicographical order