Pls help with the following questions

Q1:

Let f (x, y) = 68*"). Find the equation for the tangent plane to the graph of f at the point (1, 2) . (Use symbolic notation and fractions where needed.) "i Indicate Whether the following statement is True or False. Let f(x, y) = gig for (x, y) 7e (0, 0) and f(0,0) = 0. Then f is continuous at (0, 0). Using vector algebra, identify all of the following vectors that are equivalent to (u + v) X W. vXw - uxw uxw +vxw -wXu - WXV uxw - VXw wXu+wxv