The negation of $\sim s \vee ( \sim r \wedge s )$ is equivalent to (1) $s \wedge r$ (2) $s \wedge \sim r$ (3) $s \wedge ( r \wedge \sim s )$ (4) $s \vee ( r \vee \sim s )$
The negation of $\sim s \vee ( \sim r \wedge s )$ is equivalent to\\
(1) $s \wedge r$\\
(2) $s \wedge \sim r$\\
(3) $s \wedge ( r \wedge \sim s )$\\
(4) $s \vee ( r \vee \sim s )$