In JAva please

A: Write a java implementation of a single-threaded calculator server program that receives a sequence of positive integers from a client until the server receives - 1. The server should find and return to the client the largest odd integer of them and counts its occurrence. Hint For example, if the client sends 358 555-1 the program finds that the largest odd number is 5 and the occurrence count for 5 is 4 B: Write a java implementation of a test client program that prompt the user to input a sequence of positive integers fending with -1, send them properly to the calculator server and display the result as retrieved from the calculator server C: Write a multithreaded variant of the calculator server in Part A. The multithreaded server should be able to handle multiple clients concurrently A: Write a java implementation of a single-threaded calculator server program that receives a sequence of positive integers from a client until the server receives - 1. The server should find and return to the client the largest odd integer of them and counts its occurrence. Hint For example, if the client sends 358 555-1 the program finds that the largest odd number is 5 and the occurrence count for 5 is 4 B: Write a java implementation of a test client program that prompt the user to input a sequence of positive integers fending with -1, send them properly to the calculator server and display the result as retrieved from the calculator server C: Write a multithreaded variant of the calculator server in Part A. The multithreaded server should be able to handle multiple clients concurrently