draw a reference diagram for this codes:

(a) data = [None, None, None, None, None, None]

for i in range(5):

data[i] = [1 * i, 11 * i, 111 * i]

data[-1] = data

(b) all = [10, None]

tail = all

DRAW HERE

for i in range(4):

tail[1] = [i * 10 + 20, None]

tail = tail[1]

DRAW HERE

print(all)