Evaluate the given expressions

Suppose its sales in January were as follows: 700 hardcover books, 1,300 softcover books, and 2,000 plastic books sold in San Francisco, and 400 hardcover, 300 softcover, and 500 plastic books sold in Los Angeles. Write these sales figures in the form of a matrix, and then show how matrix algebra can be used to compute the inventory remaining in each store at the end of January.\f5. Let X be a single observation from the pdf f(x; 0) = (1 - 0) 1-121, x=-1,0, 1;050