How many routes are there in the ordinary xyz-coordinate system from the origin to the point (i, j, k), where i, j, and k are positive integers, if we are limited to steps one unit in the positive x-direction, one unit in the positive y-direction, or one unit in the positive z-direction?

they both go up but then go back down. they both end lower than they started. lastly, they both are competitive/the second on.

explanation:

silty loam

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air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.