Please answer question 14.9 Question 14.8 is given below for reference.

14.8. For the coherent state [a) = e-la12/2 all k.s [nk.s) nkS=0 Vnk,s the expectation value of the electric field is 2n hw (a |Ela) = -2 lale(k, s) sin(k . r - wt + 8) Vwhere a = la led. Show that 2n hw [1 + 4a|2 sin(k . r - cot + 8)] V provided the contributions of photon states with k' # k, s' s are neglected, as was the case in the beginning of Example 14.1. Use the result of Example 14.2 to show that the fluctuations in electric field strength for the coherent state are the same as for the vacuum state 10k.s).14.9. Calculate (a: lja} for the coherent state la). Verify that the expectation values for E (see Problem 14.8) and B obey Faraday's law