Help please The “Brownie" camera was a popular camera not just because of a great advertising campaign by Eastman but because the average person could use it. Write a brief essay describing at least three ways the “Brownie" was made easier to use for the average citizen. (you dont have to write an essay but I need atleast three ways please!)​

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".