Complete the simulation below, which samples num_changes increases/decreases at random many times and forms an empirical distribution of your test statistic under the null hypothesis. your job is to fill in the function simulate_under_null, which simulates a single sample under the null hypothesis, and fill in its argument when it's called below.

b.. i believe would be the right one sorry if im wrong.

no, it just either gets automatically 5 points to give away, or u can choose how many points u want to give but, the answerer only gets half

there is no universally accepted definition of art. although commonly used to describe something of beauty, or a skill which produces an aesthetic result, there is no clear line in principle between (say) a unique piece of handmade sculpture, and a mass-produced but visually attractive item. we might say that art requires thought - some kind of creative impulse - but this raises more questions: for example, how much thought is required? if someone flings paint at a canvas, hoping by this action to create a work of art, does the result automatically constitute art?