P, Q, R and S are four places. To travel from P to R, one travels via Q and to travel from P to S, one travels via both Q and R. Between P and Q, there are 3 routes; between Q and R, there are 4 routes; and between R and S, there are 5 routes. The time taken to travel through these routes is exhibited on the following chart in hours for a specific vehicle: Routes table (Route number: Between P and Q / Between Q and R / Between R and S, in hours) — 1: 2 / 1 / 2; 2: 3 / 1.5 / 2; 3: 4 / 2 / 2.5; 4: — / 2 / 3; 5: — / — / 3.5. How many possible routes are there if the journey takes exactly 7 hours? **[CAPF (ACs) 2026]**