From the point https://webwork.math.su.se/webwork2_...10bfee2691.png drawn normals to the two planes https://webwork.math.su.se/webwork2_...238e3fe7e1.png and https://webwork.math.su.se/webwork2_...79ed056711.png have the equationshttps://webwork.math.su.se/webwork2_...35d2b26a81.png and https://webwork.math.su.se/webwork2_...c827bb69e1.png. A plane https://webwork.math.su.se/webwork2_...61e3c53021.png containing the two normals. Determine the intersectionhttps://webwork.math.su.se/webwork2_...238e3fe7e1.png, https://webwork.math.su.se/webwork2_...79ed056711.pngand https://webwork.math.su.se/webwork2_...61e3c53021.png. (ON-system.) ima answer the intersection

how shall i take dot product on this one?