A projectile is launched from ground level with an initial velocity of vo feet per second. Neglecting air resistance, its height in feet t seconds after launch isgiven by s = -16t²+vot. Find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when vo= 128 feet per second.(a) Find the time(s) that the projectile will reach a height of 192 ft when vo = 128 feet per second. Select the correct choice below and, if necessary, fill inthe answer box to complete your choice.A. seconds (Use a comma to separate answers as needed.)B. The projectile does not reach 192 feet.(b) The projectile returns to the ground aftersecond(s).