(There is a picture) I need some help with this... If someone just gives me part A I’ll be able to get the rest... I’ll name you Brainliest too!

Thanks guys! :)

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth