7. A rock of 0.001 m³ in volume and 7 10³ kg/m³ in density is held by a string and it is deepened into a fluid of density 1.2 10³ kg/m³.

a. (5 points)

What is the weight of the rock?

b. (12 points)

Determine the buoyant force acting on the rock.

c. (8 points)

What is the tension in the string?