Solve the problem corresponding to Example 6.12.1 when (i) X1,..., Xn is a sample from the exponential density E(, ), and the parameter being estimated

Solve the problem corresponding to Example 6.12.1 when

(i) X1,..., Xn is a sample from the exponential density E(ξ, σ), and the parameter being estimated is σ;

(ii) X1,..., Xn is a sample from the uniform density U(ξ, ξ + τ ), and the parameter being estimated is τ .