monitor 100h

I've bought 100hz WQHD 4k curved monitor, but my laptop shows only 60hz when connected with an HDMI cable which I got in the box. 1) Is it that HDMI cable doesn't support WQHD 4k? 2) If the Question 1 is true and also my laptop doesn't have DP cable, then can I use a converter for DP cable for...