To establish useful interstellar communications, we must calculate the distances between planets and stars involved and take planets and stars involved and take into account the various transmission times. Our communications are done by electromagnetic waves that travel at the speed of light. You have probably heard of the concept of light year, which measures the distance travelled by light during one year. But just how many days are there in a year? There are in fact several interpretations, but we will adopt the sidereal year, which represents the orbital period of the Earth and is equivalent to 365.26 days. Establish a simple Python function to convert a given number of sidereal years (light years) to seconds, knowing that there are 365.26 days in a sidereal year. The program d1q5.py must read an input value from the keyboard (the number of sidereal years), call the function to convert to seconds, and print the result.

b) A light-second is the distance light travels in one second. Write a Python function that will convert a given number of light-seconds to kilometers, knowing that the speed of light is speed of light is about 300,000 kilometers per second. Add to the program d1q5.py a call to the new function with the number of seconds calculated in question a), and print the result.

c) Using (calling) the functions in questions a) and b), write a function to find the distance (in kilometers) traveled by a communication signal between two stars via Earth (giving the sum of the distance from the first star to Earth and the distance from the second star to the Earth, in km). The distances between each star and the Earth are given in light years. Add instructions to the program d1q5.py to read the two distances from the keyboard, call the new function, and print the result.