DO THE FOLLOWING IN C.

char* binary_to_hex(char* number);

//Create an array of nibbles from the binary number.

//Dynamically allocate enough memory for a new string so that it can hold a hex

//number with 'HEX_MAX_DIGITS' hex digits plus 2 prefixes.

//Add the prefix '0x' to the new string.

//Get the hex digits from the nibbles in the array and save them into the string.

//Return the pointer of the new string.

char* hex_to_binary(char* number);

//Pointer 'number' is pointing a string representation of a hex number.

//Dynamically allocate enough memory for a new string so that it can hold a binary

//number with 'BINARY_WORD_SIZE' binary digits plus 2 prefixes.

//Add the prefix '0b' to the string.

//Use hex-to-binary conversion algorithm to get the equivalent binary digits of

//the hex number and save the binary digits into the new string.

//Return the pointer of the new string.