Writing R or MATLAB codes for automated parsing and calculation of each band of geospatial composite image tiff files

Writing R or MATLAB codes for automated parsing each band of geospatial composite image tiff files, storing each separate band, performing raster calculation, exporting raster calculation results as new images, and calculating statistics of each result images. Then guiding me how to do it in my computer through Team Viewer application. Requirement: R or MATLAB, Geospatial data Detailed info: For this, I will give you some files to work on. I have three files of images as examples. They are geotiff images. Each image is a composite image of four bands: B1, B2, B3, B4. All images are in one folder. I want to parse each band in every image into separate new images. For example: An image named GT_20180815 is consisted of B1, B2, B3, B4. I want to extract B1 from image GT_20180815 and save it as GT_20180815_B1 in another folder. Then do extract the B2 of the image GT_20180815 and save it as GT_20180815_B2 in another folder. Then so on and so on. But in practice, I will have hundred images, that is why I need an automated work through looping in MATLAB or R environment. Then, after each band from all images are extracted and stored them in separate no I need to do raster calculation. For example: VF = GT_20180815_B1 * GT_20180815_B2. Then I need to export VF as permanent images. Then I will have hundreds of VF images in another folder. Then from the VF folder, I need to derive statistics of each VF image: covering min, max, range, Q1, Q2, Q3, STDEV. Then export the result of the statistics derivation as new variables. Requirement: R or MATLAB, Geospatial data Deliverables: • Codes in R or MATLAB to handle geospatial data that perform the following tasks • importing images and read the spatial reference • parsing each image into their composing bands and store / export them as new geotiff images • doing raster calculation for each band (B3B4)/(B3+B4) • store or export images of results of raster calculation • deriving statistics of images • codes should be accompanied with detailed comments for clear instruction for beginners • guidance to me through TeamViewer on how to do the work in my own computer