For this quizz,

we look at Dan

and we see that he has 2 neighbors,

Sara and Alan,

who are connected.

So all of its pairs of neighbors

are connected,

so its clustering is 1.

But if we look at Alan,

he has 4 neighbors,

and only 2 pairs of them are connected,

there's possibility of 6 pairs all together,

so he has 2 out of 6 possible pairs connected,

which is 1/3.

So we can actually go ahead and mark the clustering

for each of these individuals

in the network,

and you can add them all up and divide by 5

which gives you 0.87.