A fish is a little away below the surfac...

A fish is a little away below the surface of a lake. If the critical angle is `49^(@)` , then the fish could see things above the water surface withing an angular range of `theta^(@)` where

`theta = 49^(@)`

`theta = 90^(@)`

`theta = 98^(@)`

`theta = 24.5^(@)`

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