Help!?

Hey guys,

Could anyone help with this problem?

Find the total (vector) reaction force provided by the lumbosacral disc when the person bends over from the waist at 30 to the vertical, if the muscles in the back act on the spine at 10 and can be considered to act at the centre of the spine. You can assume that the person is holding the object in his hands, which are at the ends of his arms that are hanging vertically from his shoulders.

Other necessary info:
A person has an upper body mass of 27 kg, a height from the waist upwards (i.e. to the top of the head) of 62 cm and a separation between waist and shoulder of 41 cm. He is holding a 10 kg load.

I've figured it has to do with moments? But the 10 degrees really throws me... any help with the problem itself or approach would be most appreciated!