[help] information please

dear sirs,
I´m portuguese.

I wanted information about this router: http://shop.officelan.pt/empresa/loja/3-boards-sbc/5-routerboard/154-rb75x/502-mikrotik-routerboard-750gl-level-4-rb750gl-rb750gl.html

We have two antennas and satellite toway each antenna has a modem.

The modem 01 has 50GB of download, the modem 02 has 20GB of download.

My question (about this router) is:
1-> Can I do load balancing?
2-> Can I do balancing traffic?
3-> Can I do shapping?
4-> Can I block websites?


I do not know if they realized what I need.

Basically, I want the traffic to be used at the same level in the two antennas.

What did the load balancing and that was to manage traffic.

Imagine that the antenna 01 with 20 Gb is already used, he should move on to another.

Thank you,

besdt regards