Please help asap i will mark branlist

Answer:
a its 2564
Step-by-step explanation:
easy way to do this brake the prism down into 2d shapes and find the area of all of them then add them up
26x36=936
36x28=1008
10x36=360
10x26=260
10x26=260
936+1008+360+260+260=2564