12. Consider the following C++ code int main( ) { char str [20]; cout<<"Enter a String" ; cin >>str; puts(str); return 0; } a) Write the value of str if the string "HELLO WORLD", is input to the code. Justify. b) Write the amount of memory allocated for storing the array str. Give reason. c) Write an alternative we can use to input string in place of cin. (March 2018 Score 5)