Estimate the capacity of dual close parallel runways that are to serve the traffic mix shown here under VFR and IFR conditions.

20% Four-engine jet aircraft

36% Two-engine jet and 4-enginer piston aircraft

22% Executive jet aircraft

22% Single-engine piston aircraft

(Hint: Four-engine belongs to class D; 2-engine and 4-piston belongs to class C; Executive jet aircraft belongs to class B; and single-engine piston belongs to class A)