How do you change the following from passive to active voice. 1. The pH level in the city's three swimming pools has been reduced by 3.5% in order to meet the requirements stipulated by the health inspector in her August 12 report.

2. It is essential that the chlorine and pH levels of the campus swimming pool be tested on a daily basis and, if an imbalance occurs, for the corrective action to be taken immediately by the resident technician.