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Trying to solve this schema is this correct?

I'm trying to solve this schema, I been working on it a couple of hours, have I done it right? If I haven't can you please correct me?

Given the following schema, perform the corresponding subnets design,    taking into consideration that you must take advantage of the maximum    quantity of IP's available. is a /16 network.

R1 network --> 40 hosts /26

R3 SW 4 network --> 70 hosts /25

R3 SW 5 network --> 80 hosts /25

R2 network for SW2 SW3 --> 150 hosts /24

Wireless R4 --> This one will use NAT probably, so it can be /24 as default.

Networks between routers:

R1-R2 --> /26 (because there is a switch between them)

R3-R2 --> /30

R2-R4 --> /30

So there are 7 networks. IP schema:

R3 hosts SW4: for 70 hosts

R3 hosts SW5: for 80 hosts

R3 to R2: for two interfaces

R2 hosts SW2/3: for 150 hosts

Between R2 and R1: for ~38 hosts

R2 to Wireless R4: for two interfaces