Question about grouping of notes within a bar?

Question

Please look at:
http://www.geocities.com/o_iseng/question1.html
Thanks

It is correct or not based on convention?

Do I have to used ties to make it better to be read easily & quickly?

Answer 1

Yes, this is correct. The time signature is 4/4 time which means 4 beats per measure. There are 2 dotted quarter notes which the dotted quarter note is 1 1/2 beats per measure (so 3 beats) and then there is the quarter note, which is one beat. This comes out to equal the 4 beats. Thus, making this correct.

Answer 2

Yes it is correct because the dot by the quarter note means to play half of the note before it, so therefore a quarter note followed by a dot would be 1 and a 1/2 beats. Since there are two quarter notes followed by a dot that would add up to three and then when you add that to the quarter note standing alone it equals 4.