Question

five changes which are both reversible and irreversible

Answer 1

Irreversible changes such as the burning or something which cannot be undone.
The Reversible changes such as the form of melting or the process of dissolving which can easily be reversed or changed back again. Some of the mixtures that can also be separated or can be methods like filtering and evaporating.

Examples of irresversible cooking an egg which cannot be changed back to egg, making of cake, process of tea and process of milk into curd. Last example heating paper

Examples of reversible melting, boiling, condensing, freezing & proces of evaporation