According to a survey conducted by Independent Sector, the percent of their income that Americans give to charities is related to their household income. For families with an annual income of $100000 or less, the percent approximately given by P(x)=0.0014[tex]x^2[/tex] - 0.1529x + 5.855, 5≤x≤100 where P is the percent of annual income given and x is the annual income in thousands of dollars. According to this model , what income level corresponds to the minimum percent of charity contributions,to the nearest whole number?