(a)Larry was playing with his friend, Jacky in a Garden where people can enjoy cycling in the Garden. There is a path particularly for the cyclist called "cyclist path". However, Larry and Jacky want to play roller in the cyclist path. Jacky suddenly rushed to the cyclist path on his roller at high speed when Ann, a cyclist on the cyclist path was unable to stop and thus hurt Jacky with her bicycle. Afterwards, Larry stepped out two paces on his roller onto the cyclist path and was rolling a few meters on the cyclist path with his back to another cyclist, Tom. Given that the cyclist path was long and straight, Tom did not stop his cycling when Larry was in front of him and hurt Larry's back. Tom argued that since the path was for cyclist only, he had no fault on this issue. Jacky wants to sue Ann and Larry wants to sue Tom.

Advise each of them respectively.

(We need to add a case law here according to our lecturer, thanks!)