- A space probe can orbit / land on other planets
- Mars is a kind of planet
- Therefore, a space probe can land on mars

- A space probe can land on mars
- A space probe is used for collecting / analyzing materials / samples / information
- Hence, a space probe can land on mars and collect and analyze samples

- A space probe can land on mars and collect and analyze samples
- The viking i lander was sent to mars and analyze atmospheric gases and soil samples
- Hence, the viking i lander is a kind of space probe

So, the viking i lander is a kind of space probe
In 1976, the Viking I Lander was sent to Mars to analyze atmospheric gases and soil samples. The Viking I Lander was most likely a
- A space probe can orbit / land on other planets 
- A space probe is used for collecting / analyzing materials / samples / information 
- The viking i lander was sent to mars and analyze atmospheric gases and soil samples 
- Mars is a kind of planet