A 15 m long beam AB has a fixed support at A and a roller at 10 m from A. If the free end is subjected to a concentrated load of 20 kN acting vertically downward.  1. Which of the following the value of reaction at roller support?  a. 45 kN b. 35 kN c. 25 kN d. 20 kN 2. Which of the following gives the value of fixed end moment.  a. 50 kN-m b. 40 kN-m c. 45 kN-m d. 38 kN-m