04 murano cranks over but takes 5 or6 tries for it to start

What is your question?

Seams to start on 2nd try in morning but after that it gets harder to start turns over but won't start .sometimes it starts up when I push brake pedal to floor other times I don't touch pedal and it starts runs fine once it starts getting harder to start . Thought maybe had something to do with battery its 5 yrs old but it starts .seems like its not getting gas all the time.

What makes this problem better or worse?

Seems like as engine heats up gets harder