Definitely 15 SRPs. Wherever possible, give examples and a diagram.
1 example = 1 SRP. 1 diagram = 1 SRP.
Even, any figure or definition = 1 SRP.
If you're still unsure of exactly what information they'll count as an SRP, just look back over the markings of your Mock. You'll probably be surprised at what they do and don't give them for.