The sample is of systems not components

Consider a manufacturing unit producing three-component series systems, where component's lifetimes are independent and identically distributed random variables with hazard function $h(x)=\lambda$ if x > 0, and 0 otherwise. Here, $\lambda >0$ is an unknown parameter. Let $X_1,X_2,X_3$ be a random sample of size 3 on lifetimes of systems produced by the manufacturing unit. Let $\theta =P_{\lambda }(X_1>1/2)$. If $\theta$̂ is the maximum likelihood estimate of $\theta$ based on the realization $x_1=1/2,x_2=1/6,x_3=1/3$ of the random sample, then which of the following statements are true?