This Study Mind Tutorial covers the following specification points:

AQA: 3.1.1.3

OCR: 2.2.1 {a,b(i-iii),c(i,ii),d(i)}

Edexcel: 1.16, 1.17, 1.18, 1,19, 1.20, 1.21(i,ii)

CIE: 1.3.1, 1.3.2, 1.3.3, 1.3.4