physical chemistry

P7C. 8 The normalized wavefunction of an electron in a linear accelerator is =(cosx)elkx +(sin)eikx, where (chi) is a parameter. (a) What is the probability that the electron will be found with a linear momentum (a) +kh, (b) kh ? (c) What form would the wavefunction have if it were 90 per cent certain that the electron had linear momentum +kh ? (d) Evaluate the kinetic energy of the electron