I'm a PhD student and I'm collaborating in a project with a more experienced researcher. This is the first time I collaborate with anyone, so I'm new to this. Recently, in the subject we are investigating, there were two related things to be studied. I started one and he started doing the other (we didn't actually agreed to split, it happened naturally).
In our recent meetings he mentioned that although he nailed down what specific thing must be calculated, he's struggling to find the time to do so. Now, since he is much more busy than I am, I considered offering to help with this and carry out this specific computation. Still, I'm afraid if this could be discourteous in some way.
So, when we are collaborating with someone in a specific project, and there's something the other person is doing and that person is not having the time to finish some lengthy/tedious step right now, is it fine to offer to help with it?