Slow down slider / More employees on FP

I am writing to you with two issues, but firstly I want to admin, that you have made a great job with this theme.
I would like to slow down the testimony slider on my front page, right now it is too fast and makes it uncomfortable to read. Is there any way to do it?
I would like also to make visible four of my employees on the front page without scrolling further the slider, rather that three. I noticed, that on your demo site with ability to log in to the dashboard there are four of them. Please guide me how to do it.
I am looking forward to hearing from you, thank you in advance.