Real Roots of$ x^{10} + a_9x^9 + a_8x^8 +.....+a_1x -5$

Question

The equation $ x^{10} + a_9x^9 + a_8x^8 +.....+a_1x - 5 =0 $ where $a_i $are real numbers.

Then 1. Must have one real root of multiplicity one

2. Must have atleast two real roots (distinct or repeated)

3 must have atlest 4 real roots (distinct or repeated)

4.need not have real root

My attempt: since leading coefficient and last term are given so, product of roots is negative. Thus option 4 is eliminated. But I need suggestions for other options thanks