Hunter and his children went into a grocery store and where they sell peaches for $1.75 each and mangos for $0.50 each. Hunter has $20 to spend and must buy at least 14 peaches and mangos altogether. Also, he must buy at least 4 peaches and no less than 12 mangos. If xx represents the number of peaches purchased and yy represents the number of mangos purchased, write and solve a system of inequalities graphically and determine one possible solution.