Use the ATA (actual time of arrival) You started at 1h07min, and ended at 1h42, so its been 35 min. In that time you started with 3400kg fuel, ended with 2700kg fuel

 

So you used 700kg of fuel in 35 min, thats 20kg a minute, so in 40min you would use 800kg

2700-800, gives you 1900kg

 

There are quite a few of these around - simply take the LATEST ACTUAL data ... in this case BETA to GAMMA, calculate a fuel flow (normally kg/minute will be easiest), then use that fuel flow on to the next waypoint - in this case MIKE.

 

I think these are 3 point questions - quite straight forward once you've seen it, but just be careful you use the correct data!!