Steady$-$state creep rate data are given here for some alloy taken at $200\backslash$deg C$(473$K$)$ :

If it is known that the activation energy for creep is $140000($J$)/($m$)$ol$,$ compute the steady$-$state creep rate at a temperature of $240\backslash$deg C

$(513$ K $)$ and a stress level of $50$ MPa $.$

h$^(-1)$