When a computer is powered on$,$ a number of steps allow the system to start up and run software. Some of these steps are listed below. $1.$ The computer reads data from the start of the first disk in the system. $2.$ A number of tests $($POST$)$ are carried out. $3.$ The user logs in to the system. $4.$ The system enters a boot phase. Select the answer that places the steps in the correct order. Select one: a$.2,4,1,3$ b$.1,3,4,2$ c$.3,1,2,4$ d$.4,2,1,3$