Convert the pounds into ounces first. Then simply split that amount up into 4 different groups that aren't equal. There are 16 ounces in every pound, so multiply the 15 pounds by the 16 ounces/pound. You get 240 total ounces. So all you do is split that 240 into 4 unequal groups. if you need further direction leave a comment

now, the angle of θ, can only have a "y" value that is positive on, well, y is positive at 1st and 2nd quadrants
and "x" is positive only in 1st and 4th quadrants
now, that angle θ, can only have those two fellows, "y" and "x" to be positive, only in the 1st quadrant, and also both to be negative on the 3rd quadrant.
and that those two fellows, can also be both negative in the 3rd quadrant
3/1 = 3, and -3/-1 = 3
so, the solutions can only be "3", when both "y" and "x" are the same sign, and that only occurs on the 1st and 3rd quadrants