Some physics problems

Sort of in a pinch here. I have a general idea of what to do but im unsure of my answers. Any help would be apperciated.

1) An m= 0.61 kg sphere is hung by a string making an angle of 27 degrees with the vertical wall. The string is attached to the top of the sphere. Calculate the force of friction between the sphere and the wall.

Is this just mg/2 ?

2) A person is keeping the weght M=110 kg in equilibrium using a combination of pulleys (diagram in paint below :D). Calculate the tension T between the ceiling and the top pulley.

http://img.photobucket.com/albums/v27/Po_25/Epulleys1.jpg

Now is this just simply mg + F = 2mg ? (since the system is in equilibrium then the force applied is = mg...?)

3) A sphere, mass m=35 kg, radius R=0.23 m is touching a step of height h=0.10 m. Calculate the minimal force which will push the sphere over the step.

This is 141.62 right?

The sphere needs to stick to the wall through some other force for the string to make an angle with the wall. Maybe the question is wrongly worded.

Wow, physics concepts can be very interesting but the math problems sure make it a pain in the ass.

You're still in regular physics.

HAHAHA I'M AND UNDERAGE B AND I KNOW THE ANSWERS