Please Write A Program In C++ Using Iostream Header File Only, Then Write Dry Run For Three Iterations.

Q59

Write a program that opens a file (with the open() system call) and then calls fork() to create a new process. Can both the child and parent access the file descriptor returned by open()? What happens when they are writing to the file concurrently i.e., at the same time? Write the code in C/C++ with clear explaination?

Q60

D'x/Dt + 3dX / Dt2 + 3dx/Dt +X=1 X(0)=X'(0)=X\" (0)=0