A solenoid with 515 turns has a length of 8.00 cm and a cross-sectional area of 3.30 ✕ 10−9 m2. Find the solenoid's inductance and the average emf around the solenoid if the current changes from +3.50 A to −3.50 A in 5.83 ✕ 10−3 s.

the solenoid's inductance (in H)