QUES: Prototype development can be used in the analytic stage of system of waterfall model development projects The prototype itself will then become a part of the final system

correct the punctuation.

CORRECTED: Prototype development can be used in the analytic stage of system of 'waterfall model' development projects. The prototype itself will then become a part of the final system.

QUES: Michel has a considerable practical experience with our lifts over more than 13 years as a service man for OMME LIFT Furthermore he has over the last two years been responsible for planning the driving schedules of the complete service department

correct the punctuation.

CORRECTED: Michel has a considerable practical experience with our lifts over more than 13 years as a service man for OMME LIFT. Furthermore, he has over the last two years been responsible for planning the driving schedules of the complete service department.

QUES: chrome toilet brush holder toilet brush chrome

correct the punctuation.

CORRECTED:
chrome toilet brush holder, toilet brush chrome