5. Let $\mathrm { T } 1 , \mathrm {~T} 2$ be two tangents drawn from $( - 2,0 )$ onto the circle $\mathrm { C } : \mathrm { x } 2 + \mathrm { y } 2 = 1$. Determine the circles touching C and having T1, T2 as their pair of tangents. Further, find the equations of all possible common tangents to these circles, when taken two at a time.\\