The ground state energy of a particle in potential V(x) = g(x), estimated using the trail wavefunction (5 (a) y(x) = (where g and care constants) is 1/3 2 15/hg 16 }}} 2 5(hg (b) / ( }}} (a-x), 1/3 (c) x < |a| x |a| 2 3(hg }}} 1/3 (d) 7 (g 8 1}} ) * 1/3 2