Find the Value of the Laplacian $\nabla ^ { 2 } f \text { of } f ( x , y , z ) = z \left( x ^ { 2 } + y ^ { 3 } \right)$

Multiple Choice

Find the value of the Laplacian $\nabla ^ { 2 } f \text { of } f ( x , y , z ) = z \left( x ^ { 2 } + y ^ { 3 } \right)$ at the point $( 1,2,3 )$

A) $24$

B) $30$
C) $36$
D) $42$

E) $48$

F) $54$

G) $60$

H) $66$