QUES: With a meager size of 03 megabytes it gives you a lot more than it should

correct the punctuation.

CORRECTED: With a meager size of 0.3 megabytes, it gives you a lot more than it should.

QUES: A feasibility study of the biogas chain on Sams has concluded that there is a possible basis for establishing a biogas plant on the island Such a plant would allow the ferry between Jutland and the island to sail on locally produced biogas

correct the punctuation.

CORRECTED: A feasibility study of the biogas chain on Sams has concluded that there is a possible basis for establishing a biogas plant on the island. Such a plant would allow the ferry between Jutland and the island to sail on locally produced biogas.

QUES: I came to this pharmacy when I realized there was no way for me to satisfy my girlfriends with an erection that flaccid

correct the punctuation.

CORRECTED:
I came to this pharmacy when I realized there was no way for me to satisfy my girlfriends with an erection that flaccid.