Based on the above information, answer the following: [PLS ANSWER ALL 5 QUESTIONS BELOW BECAUSE THEY ARE PART OF A SINGLE QUESTION] (with steps)

(i) If x and y represents the length and breadth of the rectangular tank, then the relation between the variables in terms of volume is

a) y = 4/x

b) x = 4/y

c) 2(xy+2y+2x)=8

d) xy +2y+2x = 8

(ii) The area of the 4 walls of the rectangular tank in terms of x and y is

a)4x+2y

b) 4x+4y

c)2x+4y

d)2x+2y

(iii) The total cost of buiding the tank is

a)Rs ( 40x+40y)

b) Rs (80x+80y)

c) Rs (120x+120y)

d)Rs (180x+180y)

(iv) The manufacturer of the tank is interested in minimizing the expense of the tank during construction. For this to happen the valve of x should be

a) 3 m

b) 5 m

c) 2 m

d) 8 m

(v) The minimum cost of construction of the tank is

a)Rs 2000

b) Rs 3000

c) Rs 1000

d) No minimum cost

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