1.Using dnorm(), graph the normal distribution with mean=10 and sd=1,4,8,16 all on the same plot. I do this for you. 2.On a second plot, use dlnorm() to graph the lognormal for mean=10 and sd=1,4,8,16. You will need to use the last three formulas above to find meanlog and sdlog. 3.Repeat part (a) scaling each curve so that its maximum is 1. 4.Repeat part (b) scaling each curve so that its maximum is 1. 5.The rule of thumb in data processing is that you can get away with using the normal distribution to model ratio scale quantities if the coefficient of variation (CoV, defined as sd/mean) is less than or equal to 10%. Do the graphs here support that rule or not? Hint: look at the grey curves on the plots and ask yourself: For mean=10 and sd=1, is the normal pdf a good approximation to the lognormal pdf? Calculate using Rstudio