Numeracy 2. A function of 7; variables x), where x = (1:1, . . . ,3\"), is said to be homogeneous of degree k E N if f(tx) = tkx) for all t E R. For each function below, show it is homogeneous (of some degree 14:) or give an example to show it is not homogeneous. 1. f(2:,y,z) = {729 +y9 + 2:9 2. at, 3;, z, w) = 1:233 + 22102 + xyzw 3- N50,?!) = v32 + :92- 1+3; 2 2 2 4. f(m,y) 2/ e"3 [(8 +3 +3'2)d3 u