please help, thankyou

After having fun, your friends decide to work on maths and compute the value of f (x, y) = 3*+2y + 310g3(y) +5 at (a, b) = (3.002, 26.998). Unfortunately, they have misplaced the calculator and also WolframAlpha is offline! Luckily, taught you how to use first order approximations and you can help them! Apply this and describe how you estimate the value of f (a, b). Having no calculator at hand, you may approximate In (3) ~ 1