Bandwidth segregation Need Help

Hi

I am very new to mikrotik device and I am facing problem in segregration bandwidth.

I have 4Mbps speed 1:1 lease line, and i have a RB2011LS-In routerboard.

my problem is i need to distribute 1 mbps and 2 mbps 1:1 lease line to another 2 person.
Please help me on segregation the bandwidth.

Thanks in Advance

Kh. Panthoi