1.)if y varies directly as x and y=40 when x=16,find k 2.)if P varies directly as Q, and P = 25 when Q = 20, find Q when P = 140 3.)if m varies directly as n, and m = 35 when n = 42, find m when n = 78 4.)if x varies inversely as y and x = 8 when y = 2, find x when y = 4 5.)find x when y = 32, given that x varies inversely as y and x = 132 when y = 4. Pls Help Me.