see the screenshots

Question 3 (1 point] Consider an n XH matrix A that is not a null matrix. Suppose that A is idempotentI and define matrix B by B = I - HA, where fis the identity matrix and k E R is a parameter. Which of the options below is the set of ALL values ksuch that B is idempotent? O{191} CW} 0 The set of all positive whole numbers. 0 The whole set R of real numbers. 0 None of the given options is correct. O{1,0, 1} O{_39033} O{051}