
For these lines, let

.

And for these, let

.
Now,

The vertices of

in the x-y plane are (0, 2), (2/3, 10/3), (2, 2), and (4/3, 2/3). Applying

to each of these yields, respectively, (2, 2), (2, 4), (-2, 4), and (-2, 2), which are the vertices of a rectangle whose sides are parallel to the u-v plane.
Answer:
B. ii and iii
Sorry if im wrong
Step-by-step explanation:
C. A chord because a chord is a line segment with 2 end points
To solve this, you can create an equation. Say the weight of Umbar is x, then Saira weighs x+25. Together they weigh 205. So, you get the equation
x+x+25=205
Then solve for x.
2x+25=205
2x=180
x=90
Then to find Saira's weight, add 25 to Umbar's weight.
90+25=115.