We have a normally open push button connected to PORTF Pin 4 according to the schematic below, select the necessary functions calls needed to read the status of the button. (Assume that each selected function call will be called in the program in the SWI USR SWI correct order) SW2 USR_SW SysCt/PeripheralEnable(SYSCTL_PERIPH_GPIOF); GPIOPinTypeGPIOInput(GPIO_PORTF_BASE, GPIO_PIN_4); GPIO PinTypeGPIO Output(GPIO_PORTF_BASE, GPIO_PIN_4); GPIO PinRead(GPIO_PORTF_BASE,GPIO_PIN_4); GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_4, Oxo); GPIO PinWrite(GPIO_PORTF_BASE, GPIO_PIN_4, GPIO_PIN_4); GPIOPadConfigSet(GPIO_PORTF_BASE, GPIO_PIN_4, GPIO_STRENGTH_2MA, GPIO PIN_TYPE_STD_WPU); GPIOPadConfigSet(GPIO PORTF_BASE, GPIO_PIN_4, GPIO_STRENGTH_2MA, GPIO PIN_TYPE_STD_WPD)