jmc

We mark the time intervals in which Malaika's elevation is between $4$ and $7$ meters in red, as shown below: The requested time intervals are: from the $2$nd to the $4$th seconds from the $6$th to the $10$th seconds * from the $12$th to the $14$th seconds In total, Malaika spends $(4-2)+(10-6)+(14-12)=\boxed{8}$ seconds at such elevation.