A3m deep, 4 m wide gate has water on one side with water surface at a height of 2.8m above its top edge. identify location of a pivot line with respect to the top of the gate in order to keep it vertical.

A)-explain briefly the importance of standards in engineering design. b)- what is patent? c)-explain the relationship between these standards: b.s. and b.s.en d)- in engineering design concepts, types of loads and how they act are important factors. explain.