You are given:

$(1){}_x(t)=0\mathrm{.}04,t>0,=0\mathrm{.}06$;

$(2)Y=a_{\frac{?}{\text{b}\text{a}\text{r}}(T)|}$;

$($iii$)Y=a_{\frac{?}{\text{b}\text{a}\text{r}}()}^{(12)}$

Calculate the mean values and variances of these two variables.