Please use program C Thank you!

Question 1: Pointers of Pointers

Write a function, named "ptr_to_ptr", that returns an int and takes three arguments:

An int called "a".

A pointer to an int called "b".

A pointer to a pointer to an int called "c".

Return the value of "a", store the value of a + 1 in the address indicated by "b" and store the value of a + 2 in the address indicated by the pointer's address of "c".

Question 2: Shorten The String

Write a function, named "truncate", that shortens a string to only have 3 non-null characters in it. The function only has a single argument, a character pointer/array. You can assume the string's size is 4 or greater.

Example usage:

char string[] = "Hello World";

truncate(string);

printf("%s ", string); // Should print Hel

Question 3: Count Bangs

Write a function, named count_bangs, that takes a single argument, a string (char pointer/array), and returns an int of the number of bangs (exclamation points (!)), in the string.

Question 4: Convert Single Quotes to Double Quotes

Write a function, named "convert", that takes a single argument, a string (char pointer/array). The function should modify the string so that all single quote characters are replaced with double quotes.

Question 5: Mixing strings

Write a program that reads in two whitespace separated strings from stdin. First your program should output the two strings it read in. Then, your program should output two letters from each string until there are no more letters in either input string. Neither input string will be longer than 10 characters.

Example input:

abcde 123456789

Correct Output:

String 1 = abcde

String 2 = 123456789

Mixed = ab12cd34e56789