1 Simple Tasks 1.1 Library 1.2 Reading Excel 1.3 Spliting the Datasets 1.3.1 Divide into train/test 1.3.2 Train/test/validation 1.4 Custom code for Cross-Validation 1.5 Misclassification error calculation 1.6 Assume that mortality y is Poisson distributed, where Y!=12..n . Write an R code computing the minus-loglikelihood of Mortality values for a given lambda. Compute the minus log-likelihood values for lambda=10,110,210,…,2910 and produce a plot showing the dependence of the minus log-likelihood on the value of lambda. ...