Rather than set this model up for you, we have just copied the previous one, so you may make the changes yourself for the practice. The only difference in this instance is that the acceleration due to gravity is 5 m/s/s instead of 9.8 m/s/s.
To edit an existing force vector, just click on the vector label in the list running down the left edge of the drawing area. The parameters of that force will appear in the force input boxes labeled |f| and f<. Change the 9.8 to 5 and press the Enter key to accept the new value the new value. Then click the plot button to see the results. Notice that you will have to extend the time limit in order for the ball to hit the ground since gravity is weaker. To answer the questions, again use the cursor to find the required values.