Circular base container:CONTAINER B. The sketch of circular base container is given below. The dimensions of the container are such that it can hold exactly 250 cm^3 of liquid. 2.1 Let k represent the height and r represent the radius of the container B. Determine the height of the container in terms of r. 2.2 Calculate the surface area of the container in terms of r. 2.3 Calculate the value of r for the surface area to be a minimum and hence determine the minimum surface area . 2.4 Calculate the cost of producing CONTAINER B.