Francisco is planning to invest up to 32 000 in corporate and municipal bonds The least he is allowed to invest in corporate bonds is 7000 and he does not want to invest more than 25 000 in corporate bonds He also does not wan to invest more than 11 000 in municipal bonds The interest is 9 on corporate bonds and 2 on municipal bonds This is simple interest for one year How much should he invest in each type of bond in order to maximize his income What is the maximum income Francisco should invest in corporate bonds and in municipal bonds in order to maximize his income