Refer to the beam shown below a. Draw the influence line for the vertical reaction at  internal hinge C.  b. Determine the maximum moment at D and its  location when a 12kN load travels across the beam. c. Determine the length and position of a 10kN/m  uniformly distributed load that will give a maximum  positive shear at C.  d. What is the moment at point D when the previous  scenario (letter c) happens?  provide solution asap, answers in 4 decimal places

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Influence Lines

The graphs that show the variation of a function at a specific point on a beam or truss due to a unit load placed at any point along the structure are known as influence lines in engineering. Some common functions that are studied with influence lines are shear, moment, and deflection. In designing beams and trusses, it is important to use influence lines in structures where loads would move along their span such as bridges, crane rails, conveyor belts, floor girders, etc. The influence lines help to study where a load will create the maximum effect for any of the functions.