Question: Please create the program in c++. I nclude comments if possible so I may study from it. 1. Write a program to read a long

Please create the program in c++. Include comments if possible so I may study from it.
1. Write a program to read a long integer number as a string and a. Find the frequency of all digits b. Remove all duplicates, and display the new number Sample 1/0 Enter a long integer number: 256772498511 Digit Frequency Number after removing all duplicates: 12456789
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