Question $2)(16$ Points$)$ Assume that the production function is q $=$ L$0\mathrm{.}4$K$0\mathrm{.}6.$ For this given function:

Find the isoquant.

What is the Marginal Rate of Technical Substitution of L for K$,$ MRTSLK$?$

Does the Marginal Rate of Technical Substitution of L for K$,$ MRTSLK$,$ exhibit increasing or decreasing behavior?

For the above production function, show whether the function exhibits decreasing, constant, or increasing returns to scale.