Which of the following statements is NOT true, based on rules pertaining to variable and function scope?

a $=4$

b $=4$

def myfunction$()$ :

a $=3$

print$($a$,$b$)$

myfunction$()$

The function will output the following: $34$

The statement global a can be added to the function so that the function changes the value of a

After the function is called, the value of a is $3$

The variable b is a global variable, since it is defined outside of the function