3. (4 marks) William was investigating the enhancement of antibodies in patients' bodies after they received an injection of a new vaccine booster. Let A(t) denote the level of antibody in a patient (in some unspecified unit) t hours after the patient received the booster shot. William hypothesised that the rate of change of the antibody level, with respect to time, was equal to t divided by the square of the current antibody level. Right after receiving a booster shot, the antibody level in Kevin's body was 10. According to William's model stated previously, What would be Kevin's antibody level 24 hours after the booster shot? Give your answers in 4 significant figures