this program is to be done in c language. Using Pointers Createa program pointerTester.c to experiment with pointers. Implementthe following steps one by one in your program: YOU NEED TO ANSWERQUESTION Use printf to print your answers at the end(after 12). 1.Declare three integer variables a, b and c. Initialize them to 0,100 and 225, respectively. 2. Print the value of each variable andits address. 3. Add the following declaration to your code: int *pA= &a, *pB = &b, *p; 4. Print the value of each pointer andthe value it points to (using the pointer) 5. Run your programmultiple times. a. Does any of the values *pA, *pB or *p change? b.Does any of the values pA, pB or p change? 6. Change the value thatp points to to 50 without declaring the valuable that p points to.Can you print the value that p points to? 7. Declare an array z of10 integers and initialize its elements to 0, 1, 2, …., 9 8. Printthe address of each element in the array using the z[i] notation 9.Print the address of each element in the array using the z + inotation 10. Print the content of the array using z + i notation11. Declare a string literal x and set it to value “hello”. 12.Change the second character of x to upper case. What happens?Strings Write a program reading.c that reads from standard inputaccording to the user’s choice. The program should ask “How wouldyou like to read?” 1: character by character; 2: word by word; 3:line by line. Default: print “Invalid choice”. You should write thethree procedures below. - The procedure readCharByChar asks theuser to enter 5 characters and read them (hint: using %c). - Theprocedure readWordByWord asks the user to enter 5 words and readthem (hint: using %s). - The procedure readLineByLine should askthe user to enter 5 lines and read them (hint: using gets). In eachof the three procedures, the values read should be printed to thescreen, each on a separate line showing: input index, tab, unit(char, word, or line). According to the user choice, your programuses a switch statement to call readCharByChar, readWordByWord, andreadLineByLine, respectively. Make sure your code is properlyindented, your variables have meaningful names, and macrodefinitions are used when appropriate.