A cylindrical specimen of a cold-worked brass has a ductility (%EL) of 40%. If its cold-worked radius is 13 mm, what was its radius before deformation

Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan