1. Please complete the following three problems:

• The tables below give the number of some species of threatened and endangered wildlife in the United States and in foreign countries in 2012.

US

Mammals Birds Reptiles Amphibians Fishes

Endangered 92 74 14 7 65

Threaten 11 16 19 5 40

Foreign

Mammals Birds Reptiles Amphibians Fishes

Endangered 252 178 65 8 11

Threaten 19 6 14 1 0

Write the two matrices on a spreadsheet as shown in the examples, and use the spreadsheet's matrix operations to find a matrix containing the total number of these species in the U.S. and foreign countries.

• Use the U.S. and foreign matrices with the spreadsheet's matrix operations to write a matrix showing how many more endangered and threatened species there are in foreign countries than there are in the United States. Write a simple equation showing your matrix operation, and explain what any negative numbers mean.
• Use the total number of wildlife matrix to find number of each species threatened and endangered if there could be a 5% reduction.