homogenous functions

would like to know if im correct, thank you so much, please show end results per each

Consider the following functions. G(x,y) = x2 + 3 y2 H (x,y) = In(x) + In(2y) L(x,y) = (x+1)1/2 + y+1 U(x,y) = x ey W(x,y) = 100 x - 4x2 + 3y Z ( x,y) = (x) 1/2 + y Which function or functions are homothetic? Select one or more: a. L b. G c. None. d. H V e. U f. W g. Z