State the term used to describe two events $X$ and $Y$ when $P(X\cap Y)=0$.

An engineering laboratory tests the reliability of a high-performance drone. The events $S$ (sensor failure) and $I$ (interference) are independent. It is observed that the probability of a sensor failure is $P(S)=\frac{5}{8}$ and the probability that the drone experiences at least one of these issues is $P(S\cup I)=\frac{5}{6}$.

Find

$P(I)$

$P(S\cap I^{\prime })$

$P(S^{\prime }|I)$