Pls I need this before midnight (USA)

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis

Use the given information to determine the exact trigonometric value.