Listed below are blood groups of O, A, B, and AB of randomly selected blood donors. Construct the relative frequency distribution. Upper O AB AB Upper A Upper A Upper A Upper A Upper O Upper O Upper O Upper A Upper A Upper O Upper A Upper A Upper B AB Upper A AB Upper B AB Upper O Upper A Upper A AB Upper A Upper A Upper A Upper A Upper O Upper O Upper O Upper A Upper A AB Upper O Upper A Upper A Upper O Upper O