For the given $4-$noded quadrilateral element below define the following

The general form of its shape function

The shape functions for $n1(,)$ to $n4(,)$

For your answers instead of the Greek characters $\text{'}\text{'}$ and $\text{'}n\text{'}$ use $\text{'}k\text{'}$ and $\text{'}h\text{'}$ respectively

Fig Q$14-4-$noded quadrilateral element