Answer:
2.6 hours to download; installation time is unknown
Explanation:
We assume there are 1024 MB in 1 GB, so the time required is ...
time = quantity/rate
time = 50(1024 MB)/(5.5 MB/s) ≈ 9309.1 s
There are 3600 seconds in 1 hour, so this is ...
9309.1 s/(3600 s/h) ≈2.5858... h ≈ 2.6 hours . . . to download
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This is the time expected for the download. We have no information about the installation time, so we cannot tell you how long it would take to finish installing.