1. Define a 5 pre-folds of equal size of 'mytitanic' in a variable called 'myfolds' (2 points) "{r} set . seed ( 2255 ) # shuffle # # Create 5 folds of equal size # myfolds . . . 2. Use pre-fold number 3 to define a testing and a training set named 'mytest' and 'mytrain (2 points) i=3 # fold number to use 3. Fit a Random Forest model to the 'mytrain' dataset. Use the column 'Survived' as a factor outcome. Require importance to be true and set the random seed to 523. (This is the 'trained model' ). (2 points) # Fitting Random Forest Classification to the training set 'mytrain