Fuel pump problem.

A young girl has a old Mazda ute which won't start. A friend has had a
look at it and reckons its not getting any fuel and reckons the fuel
pump isn't working. I had a quick look at the fuel tank and it has two
smallish objects on top of the tank at each end. I'm not sure what they
are, they each have two hoses connected to them. Additionally there
appears to be a solenoid near the tank.
Anyone know what all this stuff is and how it works?