Hello I need some help with these 3 questions. If you could please show me all your work on a separate sheet of paper with the solutions/answers that would be great!

1. Given the function M(t) = 2t - 3t - 36t, find the critical values and determine, using both the second derivative test and a sign chart, the nature of these critical values. 3. Two trains start from the same point at the same time, one going east at a rate of 40 km/h and the other going south at 60 km/h, as shown in the diagram at right. Find the rate at which they are separating after 1 h of travel. Train A 40 km/h 2. A projectile is launched with a velocity of 27m/s at 550 to the ground. Determine its horizontal Train B and vertical velocities. 60 km/h . .. .. Distance Between Trains .......................... 550 at