the strain in member ab was measured to be 8.9 x 10-4. if the member is an l3 x 2 ⁄1 2 x ⁄1 4 of a36 steel, determine the following. a. what is the change in length in inches? b. what is the force in the member, is it tension of compression? c. assume that the individual forces applied at each node are all equal. what is the total force applied to the truss and what are the reactions? d. without solving the entire truss what is the maximum tension force one needs to consider for the design of this truss?