Yоu must type yоur аnswer intо the given box аnd show аll your work. For credit, please follow the instructions below and show all the steps. Step 1. Type the provided values along with their units in the problem, and designate a specific symbol (standard) for each known value and value that you need to determine. Step 2. Type the general equations that you will use to solve the problem using the variables (no numbers yet). Step 3. Show steps to utilize the provided values and their respective units to calculate the answer for the value you need to determine. An airplane flies eastward along a straight path. It travels at a constant velocity of 250 m/s for a distance of 500,000 m. It then reduces its velocity to 200 m/s for the next 300,000 m. What is the average velocity of the airplane for its entire journey?