$4.$ Use the following code magnets in the correct order to create a WebGL vertex

shader and a fragment shader for mapping a texture pattern to a $3$D surface. Also

fill in the missing parts of the code magnets, marked within the text as blanks.

$($Note: assume that the texture and position coordinates of vertices are sent by the

application; you do not need to write the application $$ Javascript $$ code$).$

Write the final code of the vertex shader and fragment shader.