Write a C program that creates a txt file called planets.txt and contains the listed planets and planet size (radius Km). The program should scan the data in the file and complete the following tasks: - - Print all the data onto the screen. - Find the largest planet and print onto the screen. - Prompt the user for a letter and print all planet details that begin with that letter onto the screen. Please ensure your program includes the required structure template. struct planet solar_system[] = {{Mercury,2439.7}, {Venus,6051.8}, {Earth,6371.0}, {Mars,3389.5}, {Jupiter,69611.0}, {Saturn,58232.0}, {Uranus,25362.0}, {Neptune,24622.0}, {Pluto,1188.3} };