Help please 50 points! Statistics Exam. it is timed

Need this asap if anyone can i would be very grateful. if you could show workings that would really

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?