Experience points are points quantified to represent time spent behind a task. They are a measure of the effort and time a player has put into the game.
To keep things simple - we roughly estimate 1 Minute to = 10XP. This is a rough estimate and the actual XP earned can vary based on the difficulty and complexity of the task.
This makes 5min tasks worth 50XP, 15mins/150XP, 30mins/300XP, 60mins/600XP, etc. These values are just examples and the actual XP values can vary.
The above is have a base XP as there are modifiers that determine the final XP rewarded. These modifiers can be based on various factors such as the player's level, the difficulty of the task, and other game mechanics.
Ability Points are also rewarded through achievements, and determined by how much is earned in a given timeframe will unlock different abilities throughout XP.