Do I need to calculate all the possible variances if not specially asked?

Hello Sir,
In the Kaplan exam kit there is an exercise with the question on variances: “Calculate the material mix and yield variances for April. You are not required to make any comment on the performance of the managers.” – and that I did, but checking the answer at the back, I see that they calculated and also providing marking scheme for:
Price variance;
Sales price variance;
Sales volume variance.
I’m confused, as do I always need to calculate all the other possible variances even if it’s not specially mentioned in the question? Please clarify for the exam.