Alake polluted by bacteria is treated with an antibacterial chemical. aftertdays, thenumber n of bacteria per milliliter of water is approximated byn(t) = 20(t12−ln(t12))+ 30for 1≤t≤15.a. when will the number of bacteria be a minimum? b. what is the minimum number of bacteria during this time? c. when will the number of bacteria be a maximum? d. what is the maximum number of bacteria during this time?