I need b, p, l, and SA of then pyramid

The base of the pyramid is a square, and its area is calculated as follows:
[tex]\begin{gathered} B=side^2 \\ B=4^2 \\ B=16\text{ yd}^2 \end{gathered}[/tex]Given that the base is a square, its perimeter is calculated as follows:
[tex]\begin{gathered} P=4\cdot\text{side} \\ P=4\cdot4 \\ P=16\text{ yd} \end{gathered}[/tex]The slant height, l, is shown in the diagram, its measure is l = 6 yd.
Finally, the surface area, SA, is:
[tex]\begin{gathered} SA=B+\frac{1}{2}Pl \\ SA=16+\frac{1}{2}\cdot16\cdot6 \\ SA=16+48 \\ SA=64\text{ yd}^2 \end{gathered}[/tex]