c++

Exercise 4: This exercise is designed to get you familiar with the map class in STL 2. (45 minutes coding) 1. Create an empty map, whose "key" is string type and "value" is integer type 2. Add five different key-value pairs into the map 3. Print out each key-value pairs in the map 4. Insert a pair whose key exists in the map, print out the return value of the insert operation 5. Insert a pair whose key does not exist in the map, print out the return value of the insert operation 6. Please try to use both operator[] and insert method in the following two steps 1. Try to update a pair's value given a key that does not exist in the map. Any runtime errors? 2. Try to update a pair's value given an existing key in the map