HELPP!!!!!!!

You are an entrepreneur and selling handmade kites. Your company Kites-R-Fun has been contacted by a customer in Alaska who wants to purchase
several of your best-selling kites and wants you to ship them to her. You have already established the cost at $4 each and it's only going to cost you $8 to ship these items to Alaska. Your competitor Windy Kites sells the same items,
but charges half of your price. However, if the customer buys from your
competitor, she will be charged $20 in shipping costs. Write two equations to represent the customer's total cost based on how many kites she purchases from each company where y is the total is the number of kites purchased.
1. Total cost for Kites-R-Fun
y = 4x + 8
y = 4x + 20
y = 8x + 4
y = 20x + 4

2. Total cost for Windy Kites
y = 2x+10
y=2x+20
y=8x+20
y=20x+4

3. If the costumer in Alaska wants to buy 4 kites, who should she buy from?
Kites-R-Fun
Windy Kites

4. if the costumer in Alaska wants to buy 10 kites, who should she buy from?
Kites-R-Fun
Windy Kites

5. what is the solution to the system?
**HINT: on the graph, the solution is the intersection of the two lines.
**HINT: on the calculator, you can zoom out to see the point if needed. (zoom: zoom out) to find the exact point, due 2nd, TRACE, 5: intersection, enter, enter, enter.

6. Explain what your solution means in terms of the scenario.