4.6 III 6 9?." 11:58 5:3 " MATH 2225 Exe... El IQ MATH 2225 CALCULUS I|| WITH ANALYTIC GEOMEI'RY EXERCISE 3 Directions. Find a pair for this activity. Following the instruction provided in each problem. solve the following completely. Show your complete and neat solutions. A. Find the directional derivative of the function h(x,_v) = e" sing, at P[1E) in the direction of v = 1'. Find the directional derivative of the function {buy} 2 in the direction of the unit vector u = 053 1' + sinj where 3 = l. :3 Find the gradient of the function z : lntx2 y) at the point (2,3). Use the gradient to find the directional derivative of the function {my} = 91' sinx at the point PUJJU) in the direction of the pount Q(2.1) Examine the function h[x,y) = x4 3.\\'y ya for possible relative extrema or saddle point. Use the second partial test to examine them