Please explain why each statement is either right or wrong, thanks! :-)

Here is a psudocode to recognize if a sequence of parentheses is balanced or not. According to the psudocode, which of the following sequnces is balanced? declare a character stack while (more input is available) { read a character if (the character is a '(') push it on the stack else if (the character is a') ' and the stack is not empty) pop a character off the stack else print "unbalanced" and exit } print "balanced