Please help I need it ASAP

Find the center and the radius of the circle with the equation: x^-2x+y^2+4y+1=0

Which example from lorraine hansberry's a raisin in the sun demonstrates the idea of self-determination?

"edna, dear, are you not coming in soon? " he asked again, this time fondly, with a note of entreaty. "no, i am going to stay out here." "this is more than folly," he blurted out. "i can't permit you to stay out there all night. you must come in the house instantly." which best explains how chopin's use of language represents her style?