Sarah and her children went into a grocery store where they sell bananas for $0.80 each and peaches for $1.25 each. Sarah has $20 to spend and must buy a minimum of
18 bananas and peaches altogether. Also, she must buy a maximum of 4 peaches. If x
represents the number of bananas purchased and y represents the number of
peaches purchased, write and solve a system of inequalities graphically and
determine one possible solution.