ercise 5: Write a program to move the robot forward in 3s then move backward 3s and then stop using the functions developed in Exercise 4. For safety, only use the duty cycle less than 15% in this exercise, prepare a space for the robot to move and observe the robot carefully in case the robot falls out off the table. You should perform some observations of how the motors respond to different input levels. Since your robot may response differently with others, the following issues need to be investigated: - You will find that some duty levels are not sufficient to make the robot move. - You may discover peculiarities such as one motor running faster than another, or even that a motor will run faster in one direction than in the other. Note: There may be several methods to keep the robot straight, however in this lab, you may need to investigate the motor characteristics and change the input levels to complete this exercise