How many passwords of 8 character can be made using the list of character {2,5,7,A, B,C, M,Z}, so that (repetition not allowed)
i) it always starts with either ‘2’ or ‘Z’ or ‘M’ and ends with a number
ii) never ends with ‘B’ and starts with a alphabet

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.