For Problem 4(a) you do not need to explain your answer, but for Problem 4(b) make sure to show complete and correct work/explanation to earn full credit. (a) Determine whether the relation represents y as a function of x. Circle either YES or NO. i. YES NO The input value x is the name of a person in your class, and the output value y is the name of a parent. ii. YES NO Input, x 0 Output, y 2 1 3 -1 -2 -3 0 -4 8 -1 6 -6 -2 y iii. YES NO y iv. YES NO X v. YES NO The relationship: x + y = 25. (b) The point (-6,8) lies on a circle whose center is at (-2,4). Write the standard form of the equation of this circle. Find the x-intercept(s) of the circle. If an answer does not exist, state "DNE".