I need help asap!!

c) 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}