closed$-$loop control system in automation shows the following $($Check all

applied $50$ points$).$

$(1)$ Records the output variables of the process

$(2)$ Compares output variables with input variables and then automatically

readjusts process in the sense of an alignment of output and input variables

$(3)$ It can$$t react to disturbance variables

$(4)$ It$$s a continuous process where the output variable is to be maintained at a

specified value