in C language

Mr. Bhola has installed a digital lock to his door. The lock requires a 6-digit password, that he can remember but is not too obvious at the same time. Write a function that can reverse the date he enters to create a password. Like, if he enters his date of birth as DDMMYY 231279 it converts it to a password as DDYYMM 329721. Parta) Provide at least two sample input and output [4 marks] Part b) provide the declaration for at least three functions: input(), working and output() [4 marks] Part c) provide the definition for at least three functions: input(), working and output()- [8 marks] Part d) provide the calling for at least three functions: input(), working and output(). [4 marks]