How are fault lines important in the formation of fault block mountains?

The fault lines pull away from eachother and it breaks up into blocks r chunks which are either forced upwards or downwards. As hey move apart these chunks or blocks end up being stacked ontop of one another causing a fault block mountain as the fault lines have been blocked up. An example of a faultblock mountain are the Sierra nevada mountains in North America.

(i dont know how many marks this question is so you may not need that much information)

answer; the correct answer is ( north and west );

reflecting point a across the origin negates both of its coordinates.

b = (5, -4)