Quantum Mechanics: Probablities

[Robben]

Suppose we have a spin$-1$ particle in a certain state $|\phi\rangle$ under the $S_z$ basis. How do you find the probabilities that a measurement of $S_z$ will result in the values of $\hbar,0,$ or $-\hbar$?

Also, what does it mean exactly when it says what is the probability that $S_x$ will result in the value of $\hbar$ in this state?

 

[vanhees71]

Could it be that this question should be put to the homework section of these forums?