A safety$-$critical system is one whose failure or misuse may cause human injury or death.Given that an EHR system can be considered to be such a system, which set of tasks associated with software implementation deserve special attention by the Midwest Hospital project team?a$.$ Train end users, perform user acceptance testing, and provide for ongoing end$-$user support and training.b$.$ Conduct an alpha and beta test, perform a direct conversion to start up the new system, and apply the Lewin and Schein three$-$stage model for implementing the new system to ensure that appropriate changes are made to people, structure, and tasks affected by the new system.c$.$ Allow sufficient time for site preparation, perform a direct conversion from the old system to the new system, and employ the technology acceptance model to lead to better attitudes about the use of the new system.d$.$ Perform thorough unit testing, conduct frequent system reviews to ensure that the system is operating as intended, and apply the diffusion of innovation theory to plan the gradual adoption of the new system by the end users.