QUES: So far our niche topics posts are

correct the punctuation.

CORRECTED: So far our niche topics posts are :

QUES: The process that led to the concept of speedsharing consisted of four iterations

correct the punctuation.

CORRECTED: The process that led to the concept of speed-sharing consisted of four iterations:

QUES: On the left Mlynarska Street A Protestant Cemetery from 1792

correct the punctuation.

CORRECTED:
On the left: Mlynarska Street. A Protestant Cemetery from 1792.