Can someone explain and show work how to solve: Determine the % relative error for the following quantity:05) + (0.03) - (0.02) 2.

Can someone explain and show work how to solve:

1. Determine the % relative error for the following quantity: (5.47±0.05) + (0.47±0.03) - (0.87±0.02)

2. Determine the absolute error for the following quantity: 0.821mol × 36.46g/mol ÷ 0.321g/mL

3. Determine the % error for the following quantity: 12.53 cm x 99.4 cm