P is a function that gives the cost, in dollars, of mailing a letter from the United States to Mexico in 2018 based on the weight of the letter in ounces, w.

The function is defined as:

P open parentheses w close parentheses equals open curly brackets table attributes columnalign left columnspacing 1.4ex end attributes row cell 1.15 comma end cell cell 0 less than w less or equal than 1 end cell row cell 1.72 comma end cell cell 1 less than w less or equal than 2 end cell row cell 2.29 comma end cell cell 2 less than w less or equal than 3 end cell row cell 2.86 comma end cell cell 3 less than w less or equal than 3.5 end cell end table close

Draw a graph of the function. Be sure to clearly show open and/or closed circles.