Plz need help on this

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer

What is the measure of ba (the minor arc) in the diagram below?

The discrete random variables x and y take integer values with joint probability distribution given by f (x,y) = a(y−x+1) 0 ≤ x ≤ y ≤ 2 or =0 otherwise, where a is a constant. 1 tabulate the distribution and show that a = 0.1.2 find the marginal distributions of x and y. 3 calculate cov(x,y).4 state, giving a reason, whether x and y are independent. 5 calculate e(y|x = 1).