Did the LED light up for one second? Push the Arduino reset button to run the program again. $(1$pt$)$

Which line and how it must be modified to now light for $2$seconds? $(2$pt$)$

If you need to flash the led three times for $0\mathrm{.}5$ secs with $250$millisecs between flashes, then:

How the program must me modified? Write the new setup$()$ function $(3$pt$).$