Solve the wave equation (𝝏^𝟐 𝒖)/〖𝝏𝒙〗^𝟐 =(𝝏^𝟐 𝒖)/〖𝝏𝒕〗^𝟐 𝒖(𝒙,𝟎)=𝒔𝒊𝒏𝝅𝒙 (0,1), h=0.2, k=0.2 at 𝒕=𝟏.