1. Write out in full the following expressions for n = 3: a. dija; b. d **) 2. Obtain the numerical value of : a. du 81 6. δαι δαγδα 3. Determine free indices and dummy indices in following expressions : a. uð.078 + x b. T, διδη + νμδα c. Eijk k 4. Σιγκ ν, wιδι