Please solve

Sociologists have found that crime rates are influenced by temperature. In a town of 100,000 people, the crime rate has been approximated as C = -(T-65)2 + 120, where C is the number of crimes per month and T is the average monthly temperature in degrees Fahrenheit. The average temperature for May was 78 and by the end of May the temperature was rising at the rate of 5 per month. How fast is the crime rate rising at the end of May? At the end of May, the crime rate is rising by crime(s) per month. (Simplify your answer.)