3. To determine the optimum condition of his operating range for clasticity of a rubber material, an experimenter has run a Box-Behnken design on two factors; Temperature (x1) and Pressure (x2). The resulting model obtained is as below: y 59.80+5.33x,+1.73x2+4.20x/ 49.53x, +1.15xX3 Find the location of the stationary point and calculate the predicted response at the stationary point. What type of surface has been found at the stationary point? 4 Consider the design below: (0)-II acd = 18 abce - 14 cde = 15 d = 19 De = 17 ab = 17 ac = 14 abd = 19 bed = 18 ade - 14 be - 20 be = 21 abode = 16 bdc = 20 Identify the design above in detail. bj Construct a table which contains all possible effects and alias. Carry out the analysis and explain your findings in detail. 2