a. Write a synchronization solution to the below scenario using semaphores only: (3 marks) Process P2 Process P4 Process P3 77 Shared variables Put your semaphores declaration & initialization here (Example; int s=0;): Add signal and wait statements in appropriate places below based on the above scenario: //Process P2 //Process Pl //Process P3 do { do { //Process P4 dol dol P1 code } while (true); Process PI P2 code while (true); P3 code ) while (true); P4 code )while (true) ;