The next two lines are the so-called sixteenth notes, which are played in a half-beat;
The horizontal line means extension, that is, the sound in front has been beating all the time. For example, the first horizontal line 2 means two beats, and the second horizontal line 5 also means two beats. The last five are played in four beats because it has two bars.
Arc means Legato. The two sounds connected by the arc in the spectrum are the same, that is to say, these two sounds only need to be played once, and it is enough to press the full beat.
I hope my answer can help you! !