Price controls on rents are frequently implemented by governments in an effort to protect renters from high housing prices. Differentiate the type of price control used from other potential price controls, and then formulate reasons as to why governments should be careful when implementing these types of controls. PLZ I NEED HELP!!

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.