A couple of two-way radios were purchased from different stores. Two-way radio A can reach 4 miles in any direction. Two-way radio B can reach 8.05 kilometers in any direction. Part A: How many square miles does two-way radio A cover? Use 3.14 for π and round to the nearest whole number. Show every step of your work. Part B: How many square kilometers does two-way radio B cover? Use 3.14 for π and round to the nearest whole number. Show every step of your work. Part C: If 1 mile = 1.61 kilometers, which two-way radio covers the larger area? Show every step of your work. Part D: Using the radius of each circle, determine the scale factor relationship between the radio coverages.