The dataset above contain the abundance of juvenile salmon, forage fish (pacific herring, surf smelt, and shiner perch), and other species on eelgrass and nearby unvegetated habitat. The researchers captured individual fish with a lampara net in the two habitats from April to September 2008-2010. The data also included vegetation status, water depth, temperature, salinity, and clarity for each fish netting event.

a. List the categorical variables.

b. Use data visualization to get an idea about the following hypotheses for the abundance of

salmon, pacific herring, surf smelt, and shiner perch:

H1: Abundance of each species does not differ between eelgrass and unvegetated habitat.

H2: Abundance of each species in eelgrass does not differ among zones.

c. Check the normal distribution of water depth, temperature, and salinity.

d. Determine whether water depth, temperature, and salinity are related?

NOTE: code that has been run on rstudio without giving errors should be provided in the answer please