Joseph and his children went into a bakery where they sell cupcakes for $4.75 each and donuts for $1 each. Joseph has $40 to spend and must buy at least
10 cupcakes and donuts altogether. Also, he must buy at most 4 cupcakes. If x
represents the number of cupcakes purchased and y represents the number
of donuts purchased, write and solve a system of inequalities graphically and
determine one possible solution.