If an underwater vehicle were to explore such a depth what

Question

Problem: The Mariana trench is located in the Pacific Ocean at a depth of about 11 000 m below the surface of the water. The density of seawater is 1025 kg/m³.

Part A: If an underwater vehicle were to explore such a depth, what force would the water exert on the vehicle's observation window (radius = 0.229 m)?

Part B: For comparison, determine the weight of a jetliner whose mass is 5.63 × 10⁵ kg.

If possible just a brief explanation how you got the answer?