Hi, im in the middle of extending SUVAT equations, im learning from a book so have no tutor to ask about this, i hope someone here can help

if a ball is thrown from 1.2m above ground to a overall height of 2.45m then S=2.45 and So=1.2 correct?

Now when the ball comes back down to be caught in the hand what is S and So?

thanks in advance!