I need C codes for linux platform.

5554352352352351525235239832532121114590234184112223253212115555235152523523983253212 6721345123515252352398590235825212415972035235235232142365236923485212482592398511111 2222222222222224102418411222222222224111111111142341359282011111532532121114125555555 2351525235239841122222222222441122222222222411111111114352352352351525235239832532121 236721345123253212111435235235235152523523983253212111459023418411222325321211 6721345123515252352398590235825212415972035235235232142365236923485212482592398511111 2222224112222222222241111111122222222241024184112222222222241111111111423413592820111 4112222222222241111111112325321211143523523523515252352398325321211145902341841122232 2351525235235152523523411222222222224111111115972035235235232142365236923485212482592 1145902341841122232234112222222222241111111159720352352352321423652369234852124111111 2820111115325321211141255555555235152523523983253212111459023418411222325321211252352 11114234135235235152523521511114234135522222411 253212112523528201111153253212555512111455552351525235239832532121114590234184 0234183523523515254112555435223523983253212111459223253212115515252352398325321255235 2352351525235215252352222241024184112222222222241111111111423413592820111115325321211 2. The cp command copies the source file specified by the SourceFile parameter to the destination file specified by the Destination File parameter. Write a C program that mimics the cp command using open() system call to open source.txt file in read-only mode and copy the contents of it to destination.txt using read() and write() system calls. 3. Repeat part 2 (by writing a new C program) as per the following procedure: (a) Read the next 100 characters from source.txt, and among characters read, replace each char- acter '1' with character 'A' and all characters are then written in destination.txt (b) Write characters "XYZ" into file destination.txt (c) Repeat the previous steps until the end of file source.txt. The last read step may not have 100 characters