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Complete this problem by defining two string variables named empty and greeting. Store the word Hello in greeting and store the empty string in empty. strings.cpp Write a program that reads in the first and last name of a person and formats the full name as the last name, followed by a comma, a space, and the first name. For example: Please enter your first and last name on the next line. Harry Morgan Morgan, Harry name.cpp \( \begin{aligned} 1 & \text { \#include } \\ 2 & \text { \#include } \\ 3 & \text { un } \\ 4 & \text { using namespace std; } \\ 5 & \text { int main() } \\ 7 & \{ \\ 8 & \text { cout } \ll \text { "Please enter your first and last name on the next line." } \\ 9 & \text { endl; } \\ 10 & \text { cout } \ll \text { full_name } \ll \text { endl; } \\ 11 & \text { cotro; } \\ 12 & \text { return } 0 ;\end{aligned} \) Use the correct input to initialize the name variable. main.cpp