From the top of a tower, $80\,\text{m}$ high from the ground, a stone is thrown in the horizontal direction with a velocity of $8\,\text{m/s}$. The stone reaches the ground after a time $t$ and falls at a distance $d$ from the foot of the tower. Assuming $g = 10\,\text{m/s}^2$, the time $t$ and distance $d$ are given respectively by