Problem $4(0\mathrm{.}5$ point$)$ Draw a flowchart to debug the problem "Lamp doesn't work". There are

two factors to rule out before you make the decision to "repair the lamp". The first factor is the

lamp is not plugged in$.$ If that is the case, display message "plug in lamp". The second factor is

bulb burned out. If that is the case, display message "replace light bulb".