1

undefined

Error

null

5, 5, 15, 25

5, 25, 15, 10

5, 25, 15, 15

5, 5, 15, 15

6 2 1 5 7 3 8 4

6 2 1 3 5 7 4 8

6 2 1 3 4 8 5 7

6 2 1 3 8 4 5 7

9

10

11

12

r1, r2, m2, m1

r1, r2, m1, m2

r1, r2, r1, r2, m1, m2

r1, m1, r2, m2

3

1

NaN

ReferenceError: Cannot access 'a' before initialization

1 0 0

1 0 undefined

1 undefined undefined

0 0 0

1, undefined

1, 1

undefined, undefined

error

a c d

a c e

a c

undefined

First Second

Third

Third Third

Third Fourth