What will be displayed by this code?

Select one:

a. Nothing

b. test()

c. Blinking text

d. HELLO WORLD!

What will the value of $x be at the end of this script?

Select one:

a. 1

b. 2

c. 3

d. There will be an error

What will this code display?

Select one:

a. 1

b. 3

c. Warning or no value

d. An error