There is a magnetic field in a solenoid of finite length 1-uniformly in the central part of the solenoid; 2- decreases as it gets closer to the edges; 4-increases as you move away from the center of the solenoid; 8 - invariably along the entire length of the solenoid. Specify the sum of the correct statement numbers.

The correct statements are 1 and 2. The magnetic field inside a solenoid of finite length is uniformly distributed in the central part of the solenoid (statement 1). However, it decreases as it gets closer to the edges (statement 2). Statement 4 is incorrect because the magnetic field does not increase as you move away from the center of the solenoid. Statement 8 is also incorrect because the magnetic field is not invariably along the entire length of the solenoid. Therefore, the sum of the correct statement numbers is 1 + 2 = 3.