Please see attachment

a) The value of absolute minimum value = - 0.3536  

b) which is attained at    

Step-by-step explanation:

Step(i):-

Given function

                            ...(i)

Differentiating equation (i) with respective to 'x'

                        ...(ii)

Equating Zero

Step(ii):-

Again Differentiating equation (ii) with respective to 'x'

put

The absolute minimum value at  

Step(iii):-

The value of absolute minimum value

         on calculation we get

The value of absolute minimum value = - 0.3536      

Final answer:-

a) The value of absolute minimum value = - 0.3536  

b) which is attained at