Table:
0
A
B
C
D
E
1
Notes
2019
2018
2017
2
At 31 March Notes
£m
£m
£m
3
Derivative financial assets
1,592
1,509
2,246
4
Investments
23
3,268
3,075
1,564
5
Trade and other receivables a
17
1,766
2,518
2,729
6
Contract assets
6
1,602
–
–
7
Cash and cash equivalents
24
1,666
528
528
8
9,894
7,630
7,067

Questions and formulas:
Question: What is the change in the Derivative financial assets from 2018 to 2019?
Formula: C3 - D3
Formula2: C3 - D3
Level: Calculation
Question: What is the average investments for 2017 to 2019?
Formula: (C4 + D4 + E4) / 3
Formula2: (C4 + D4 + E4) / 3
Level: Calculation