Which statement is the converse of the conditional statement:

if point b bisects line segment ac into two congruent segments, then point b is the midpoint.
if point b is the midpoint, then point b bisects line segment ac into two congruent segments.
if point b is not the midpoint, then point b does not bisect line segment ac into two congruent segments.
point b bisects line segment ac into two congruent segments if, and only if, point b is the midpoint.
if point b does not bisect line segment ac into two congruent segments, then point b is not the midpoint.

With these 5 geometry questions! pls 1.)quadrilateral abcd is inscribed in this circle. what is the measure of ∠a ? enter your answer in the box.°2.)quadrilateral abcd is inscribed in a circle. what is the measure of angle a? enter your answer in the box. m∠a= 3.)quadrilateral abcd is inscribed in this circle. what is the measure of angle b? enter your answer in the box. m∠b= °4.)quadrilateral abcd is inscribed in this circle. what is the measure of angle a? enter your answer in the box.°5.) quadrilateral abcd is inscribed in this circle. what is the measure of angle c? enter your answer in the box.°