Problem: People are on a stage playing instruments. A man in a black shirt is playing a drum set. a man in a green shirt

Answer: plays a guitar at the front of the stage.

Problem: How to study for a science exam
Know the test format and subject material.
This is the best place to start, as you don't want to study things that won't be covered on the exam.
This will help you frame your studying so you can gather all relevant readings, notes, handouts, and labs.

Answer: This will also help you decide how much time you need to allot to studying for the exam. Knowing the format of the exam will help you know what techniques would be best to study for the exam.

Problem: How to harvest sunflower seeds
Wait until the sunflower begins to wilt.
Sunflowers are ready to harvest once the heads become brown. If you have a particularly wet season however, they can go mouldy [if this is the case you will need to cut off the head once the back of it is yellowing and allow the drying process to continue in a greenhouse or shed].
Answer: You should prepare them for the drying process once the back of the head begins to turn yellow to yellow-brown. In order to harvest the seeds, the sunflower head must be completely dry.