FIA introduces extra practice session and safety measures for Qatar Grand Prix.
Analysis finds tire issues due to kerbs at Qatar circuit.
Track limits adjusted at Turns 12 and 13.
10-minute practice session added for drivers.
Sprint Shootout delayed by 20 minutes.
Pirelli to assess tires after Sprint race.
Tire life limited to 20 laps for new tires in Grand Prix.
22 laps allowed for used tires.
Drivers must make at least three pit stops in the 57-lap race.
Measures aim to address tire safety concerns in Qatar.