in the image below, create the c++ code for each function labeled a through c Remove any punctuation and whitespace characters from the input.o Example:3. Encryption AlgorithmThe encryption algorithm shall consist of two parts: (1) substitution, and (2) encryption on blocksof size 4 x 4 characters. The detailed description of the steps is as follows:a) PreprocessingInput Text:Output Text: ENCRYPTTHISMESSAGEUSINGTHEALGORITHMDESCRIBEDBELOWb) SubstitutionPerform a polyalphabetic substitution using the Vigenère cipher on the input file with thekey provided in the key input file.Example:Key:Input Text:Output Text: WVOGJTXQHUHXICWYYMGHTRKQHQPWKYVGLPYSPWGOINTOFOPMOExample:Input:WVOGJTXQHUHXICWYENCRYPT THIS MESSAGE USING THE ALGORITHM DESCRIBED BELOWYMGHTRKQHQPWKYVGLPYSPWGOSIMPLEEXAMPLEKEYc) PaddingSteps d) - f) are performed on blocks of size 4 x 4 characters formed from the output ofstep b (i.e., substitution). They are parts of AES and as in any block cipher, the input hasto be padded. In this particular case, pad the output from the previous step with A's sothat the length of the message is divisible by 16.PageENCRYPTTHISMESSAGEUSINGTHEALGORITHMDESCRIBEDBELOWOutput:WVOGJTXQHUHXICWYYMGHTRKQHQPWKYVGLPYSPWGOhp2 > o

Answer: Algorithms: Step1: We have created function removeSpaceAndpucht and pass the arguments as string str Step2: the we run the for loop from 0 to entire length Step3: if check the string space and punctuation then not store in the string Step4: In the main function we have initialized the string and Step5: then we have passed the string to the function and print the string We have code in C++ programming language and also our guidelines is if programming question then do first question only so will see in the code in more details(a).Answer: C++ CODE #include <iostream>using namespace std;void removeSpaceAndpucht(char *str){ int c = 0; for (int i = 0; str[i]; i++) if (str[i] != ' ' && str[i]!='.') str[c++] = str[i]; str[c] = '\0';}int main(){ char str[] = "ENCRYPT THIS MESSAGE USING THE ALGORITHM DESCRIBED BELOW."; removeSpaceAndpucht(str); cout << str; return 0;}