Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Pirate Rick sailed his ship to a tropical island in search of a site to bury his treasure.  After finding the perfect site, it took him 4 hours to dig up 8 feet of sand under which to bury the treasure.  Once the treasure was buried, he left the island.  Then, a tropical storm came and washed away half of the sand from on top of the treasure.  Next, a giant tsunami wave poured over the island, adding 2 feet of new sand back onto the site of his treasure. When Pirate Rick returned, how long did it take for him to dig up his treasure?

### Response:
 Pirate Rick anachimba kwa kasi ya futi 8 ya mchanga kwa masaa 4, au futi 2 kwa saa. Kwa hivyo, dhoruba iliosha futi 8 ya mchanga, au futi 8 * 0.5 = futi 4 ya mchanga juu ya hazina. Kwa hivyo, wimbi la tsunami liliongeza futi 2 ya mchanga, au futi 2 - futi 4 = futi -2 ya mchanga juu ya hazina. Kwa hivyo, wakati Pirate Rick aliporudi, hazina ilikuwa futi 8 - (-2) - futi 4 = futi 6 chini ya uso. Kwa kuchimba kwa kasi ya futi 2 kwa saa, Pirate Rick angeweza kufunua hazina yake kwa masaa 6/2 = masaa 3.