x = undefined+
−
y = undefined+
−
z = undefined+
−
s = undefined+
−
u = undefined+
−
r = undefined+
−
t = undefined+
−
ReferenceError: "q" is not defined+
−
b = 10+
−
ReferenceError: "b" is not defined+
−
Value of 'a' inside the function 20+
−
Value of 'a' outside the function 10+
−