Extracted text: 10 kip/ft 50 kip · ft A B 5 ft 5 ft The simply-supported beam above is subjected to a uniformly distributed load and couple moment, as shown. The beam is supported by a pin at A and roller at B. Which of the following best describes the shape of the shear diagram between point A and the midspan of the beam? a) zero b) constant c) linear d) parabolic e) cubic