Can I get the solution for these Engineering physics practice problems? Subject is Classical Mechanics.

Textbook (required): Classical Dynamics of Particles and Systems 5th Ed., by S.T. Thornton and J.B. Marion, Cengage Learning 2012.

1) [30 points] Consider a planet of radius b, which consists of a homogeneous outer shell with mass ma and inner core of mass mi and radius a. A narrow tunnel is dug toward the core. a. Write an expression for the magnitude of the gravitational field, g, m2 at a point in the tunnel which is a distance R from the center of the m1 planet where a