Rose, Lily, Sunflower, and Daisy are all flowering plants that grow in normal soil. Cactus is a succulent plant that grows in arid/desert conditions.

Raj is 9th from left. Priya is 5 positions right of Raj, so Priya is 9+5=14th from left. From right: 20-14+1=7th from right.

Since all trees are plants and no animal is a plant, logically no animal can be a tree.

From two 'some' statements, we cannot draw a definite conclusion about the relationship between singers and actors.

Although all gold is precious, only some precious things are expensive, so we cannot definitively conclude gold is expensive.

Since no criminal is honest, it means all criminals must be dishonest (contrapositive of the first statement).

Since some decision makers are not politicians, and all leaders are decision makers, some leaders must not be politicians.

While no student is lazy, and lazy people are unsuccessful, this doesn't tell us about unsuccessful students who might be lazy or for other reasons.

Since all X are Y and no Y is Z, by logical deduction, no X can be Z.

While some problem solvers are not creative, some software engineers might still be creative - this is possible but not definite.