\text { The height, in fect, to which a golf ball rises when it is short upward from ground level is described by } h(t)=-16 t^{2}+48 t \text {. Where, } t \text { is the time elapsed in seconds. Use the discriminant to determine whether } \text { the golf ball can reach a height of } 32 \text { feet or not, and if it can then how many times it reaches that height. }