[填空题]
A right cylinder has height ℎh mm a3o.hm-53xnn igbxu5xr;m)jrp.) d nt*z.p i und diametlkexhf .t*x,:q:w 7x.mfli k*er x mm. The volume of this cylinder is equal to 4xm:7*i ehfkw q x,:llkft.*x. 5 $mm^3$.
The total surface area, A, of the cylinder can be expressed as A=$\frac{π}{2}x^2$+$\frac{k}{x}$.
1.Find the value of k. k =
2.Find the value of x that makes the total surface area a minimum.
