QUESTION $2$

A small, initially stationary block is released on a frictionless ramp at a height of $3\mathrm{.}0m.$ Hill heights along the ramp are as shown in the figure. The hills have identical circular tops, and the block does not fly off any hill.

$($a$)$ Which hill is the first the block cannot cross?

$($b$)$ What does the block do after failing to cross that hill?

Of the hills that the block can cross, on which hilltop is

$($c$)$ the centripetal acceleration of the block greatest and

$($d$)$ the normal force on the block least?

NEED FULL CALCULATION FOR BETTER UNDERSTAND $,$please check the image file