Answer:
IGR = 9.1640%
Step-by-step explanation:

.45 dividend payout ratio
1 - .45 = .55 retention ratio
ROA = Return on Assets

Income before taxes 6,200
Assets 11,820 + 28,800 = 40,620 Total Assets
ROA 6,200 / 40,620 = 0.15263417


IGR = 0.09164031 = 9.1640%