1. (a) The price of a washing machine, inclusive of sales tax is Rs. 13,530/-. If the sales tax is 10%, find its basic price.   2. (b) What sum of money will amount to Rs. 3,630/- in two years at 10% per annum compound interest?   3. (c) Solve using the quadratic formula x2 − 4x + 1 = 0. (Type in the answers separated by commas. Copy and paste the √ (square root) symbol from the question. Leave no spaces in your answer.)