**(i)** Writes two pairs of possible coordinates such that Rohan scored 20 and 5 points for them. For examples, (1.5, 0) and (3.5, 0).

**(ii)** Finds the distance of (2, 2.5) from (0, 0) as:

√(4 + 6.25) = √10.25 units

Hence, concludes that 5 points will be awarded.

**(iii)** Finds the distance of (1.2, 1.6) from the origin as:

√{(1.2)^{2} + (1.6)^{2}} = 2 units

Assume that the second arrow lands on the boundary mark and writes that the ratio in which the first arrow divides the origin and the second arrow's landing mark is the ratio of their radii = 2:1.

Assumes the coordinates of the second arrow's landing mark as (x, y) and uses section formula to write:

(2x+0/3, 2y+0/3) = (1.2, 1.6)

Solves the above equation to find the values of the coordinates of the second arrow's landing mark as (1.8, 2.4).

OR

Identifies the distance between the origin and the coordinate (m, -m) as 2 units and uses the distance formula to write the equation as:

m^{2} + (-m)^{2} = 2^{2}

Simplifies the above equation as 2m^{2} = 4.

Solves the above equation to get y as √2 and (-√2).