Based on the arrangement of flagella, explain the types of bacteria

Based on the arrangement of flagella, there are four types of bacteria:
(i) Monotrichous: A single polar flagella. e.g. Pseudomonas aeruginosa.
(ii) Lophotrichous: A cluster of polar flagella. e.g. Pseudomonas fluorescens.
(iii) Amphitrichous: Either a single or cluster of flagella at both the cell poles. e.g. Aquaspirillum serpens.
(iv) Peritrichous: Flagella arranged along the sides of the bacteria. e.g. Salmonella typhi.