Calculate the minimum height $\text{'}$H$\text{'}$ from where the car should start, in order to keep the car on the track of the top of the loop with a radius $\text{'}$R$\text{'}.$ Calculate the speed of the car at the top of the loop. Calculate the speed of the car when it leaves the horizontal track $($on the bottom of the loop$)$ and also horizontal displacement of the car if that height that the car travels to the ground is $\text{'}$y$\text{'}$ m$.$