Projectile Motion: $(3$ pts$)$ When Ben gets to Andrew's house, Andrew is playing football. He punts the ball to Ben from a height of $0\mathrm{.}2$ m at an angle of $45$ with an initial resultant velocity of $21\frac{m}{s}.$ Ben catches the ball at a height of $1\mathrm{.}2$ m $.$ How would each of the following change the trajectory of the ball $($assume all other variables are unchanged$)?$ Consider the major components of projectile motion trajectory $($i$.$e$.,$ time in air, horizontal$/$vertical displacement, take$-$off vs$.$ landing velocity$)$ and list at least two changes for each item.

a$.$ Decreased initial velocity:

b$.$ Decreased the takeoff angle to $30$ :

c$.$ If$,$ on the descending side of the trajectory $($i$.$e$.,$ when traveling down$),$ Ben let the ball hit the ground: