On Python 3.6, determine the output of the following code:

a=([10,11], [12,13,14], {15,16})

x=a

z=[100]

z.extend(x)

x[2].add(Hello)

x=a[0]

x.append (100)

x[0:2] = [200, 300]

a [1].append(a[2])

a[1][3].add(50)

print(a)

print(x)

print(z)

Explain this result (draw pictures).