12.15 Consider the following modification of (12.36), where t is a parameter to be fixed prior to solving the problem: minx(x123)2+(x2t)4s.t.1x1x21x1+x21+x1x21+x1+x20. (a) For what values of t does the point x=(1,0)T satisfy the KKT conditions? (b) Show that when t=1, only the first constraint is active at the solution, and find the solution