Find the area of the surface obtained by rotating the curve about the x-axis. y = x^2/4 - ln x/2. 1 lessthanorequalto x lessthanorequalto 7 select the correct answer. pi/4[1, 720 - 81 ln(7) - (ln (7))^2] pi/4[359 - 36 ln(7) - (ln (7))^2] pi/4[648 - 49 ln(7) - (ln (7))^2] pi/4[2.599 - 100ln(7) - (ln (7))^2]