Serial numbers for a product or to be made using two letters followed by four digits the letters are to be taken from the first seven letters of the alphabet with no repeats the digits are taken from the 10 digits (0,1,2,…,9), with no repeat how many serial numbers can be generated

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte