Hi. This is Tanushree. I love working with Excel on different projects and fascinated with its immense capabilities. I have attempted to answer challenge questions 2 and 3 through a merged data using Power query. I found maximum stay at ISS happened in 2010 decade and dominated by United States and Russia. Further it is interesting to see that 1970 decade saw no female participation in space exploration and same for 2020 decade as of now. Here is my submission. Thanks!